Whoppah Design Glossary

A reference of the terms our curation team uses every day. 150 definitions covering design movements, materials, furniture types, lighting, art, handbag terminology, condition grades and the marketplace mechanics that make secondhand design work. Each term has its own anchor — copy the URL to share a single definition.

Eras & Movements

Art Deco

A decorative style that peaked between 1920 and 1939, defined by geometric symmetry, lacquered surfaces, exotic woods like Macassar ebony, and inlays of brass, ivory or mother-of-pearl. On Whoppah, Art Deco shows up most in sideboards, vitrines and lighting from French and Belgian makers.

Art Nouveau

Late 1890s to about 1910. Curved, organic lines inspired by plant forms — think Hector Guimard's Paris metro entrances or the whiplash chairs of Henry van de Velde. Often confused with Art Deco; the rule of thumb is curves (Nouveau) vs angles (Deco).

Arts & Crafts

British movement led by William Morris from the 1860s. Honest joinery, exposed mortise-and-tenon, oak as the default wood, hand craftsmanship valued over factory polish. The intellectual seed that later led to Bauhaus.

Bauhaus

Design school founded by Walter Gropius in Weimar in 1919, moved to Dessau in 1925. Tubular steel, primary colours, geometric clarity. Marcel Breuer's Wassily and the Mies van der Rohe Barcelona chair are still in production a century later.

Brutalism

Architectural movement of the 1960s and 70s that overflowed into furniture: heavy, sculptural pieces in raw oak, blackened steel, slate or concrete. Paul Evans and Lane Acclaim are the names to know.

Contemporary

Loose label for design made roughly from 2000 onward. Less a style than a posture: comfortable mixing materials, willing to quote earlier eras. Look for it on Whoppah under pieces from Patricia Urquiola, Konstantin Grcic and Hella Jongerius.

De Stijl

Dutch movement founded in 1917, identified by the primary palette and right angles of Mondrian's canvases. Gerrit Rietveld's Red and Blue chair (1917) and Zig-Zag chair (1934) are the canonical pieces.

Dutch Design

Catch-all for the conceptual, witty, often material-driven design that came out of the Netherlands from the 1990s onward. Droog Design, Hella Jongerius, Marcel Wanders, Piet Hein Eek. Sustainability and irony in equal measure.

Eclectic

An interior that deliberately mixes eras and styles — a Wegner chair next to a Memphis lamp next to an African mask. Done well it's a thesis; done badly it's a yard sale. Curation makes the difference.

Gustavian

Late 18th-century Swedish neoclassicism named after Gustav III. Pale palette, painted finishes, slim tapered legs, restrained ornament. The visual ancestor of today's Scandinavian Modern.

Hollywood Regency

1930s-50s glamour aesthetic from California: brass, mirrored surfaces, lacquered black, faux-bamboo, jewel-tone velvets. Dorothy Draper is the matriarch. Returns to fashion every decade or so.

Industrial

Furniture and lighting built for factories from roughly 1880 to 1960 — cast iron, steel, riveted joints, enamel-shaded lamps. Tolix stools and Jielde lamps are the genre's hits.

Italian Modernism

Postwar Italian design, c. 1945-1980. Sculptural, sometimes theatrical, deeply confident with colour. Gio Ponti, Achille Castiglioni, Joe Colombo, Vico Magistretti. Cassina and Arflex were the patron manufacturers.

Japandi

Recent hybrid of Japanese wabi-sabi and Scandinavian Modern. Pale woods, dark accents, near-empty rooms. More of a styling vocabulary than a movement with a manifesto, but it sells well.

Memphis

Milan-based design collective started by Ettore Sottsass in 1981. Saturated colours, geometric forms, terrazzo and laminate. Lasted only six years on paper but is the visual reference for almost everything labelled 'postmodern furniture' today.

Mid-Century Modern

Roughly 1945-1970. Tapered legs, organic curves, mass-produced quality. Eames, Saarinen, Bertoia and Knoll in the US; Wegner, Jacobsen and Juhl in Denmark. The most consistently appreciating segment on Whoppah.

Minimalism

Postwar reduction to essentials — Dieter Rams' ten principles, John Pawson's interiors. Less ornament, more material truth. Beware fake minimalism that's just empty.

Postmodernism

Late 1970s onward. Quotes historical ornament with irony, mixes high and low. Memphis is its most photogenic chapter; Robert Venturi the theorist.

Rococo

18th-century French style — asymmetry, gilt, shell motifs, pastel palette. Mostly relevant on Whoppah for antique mirrors, console tables and the occasional bergère.

Scandinavian Modern

Nordic strand of Mid-Century Modern. Honest woods (oak, teak, beech), wool upholstery, restrained palette, designs that age for decades. Hans Wegner, Arne Jacobsen, Børge Mogensen, Finn Juhl.

Shabby Chic

Distressed, painted-and-sanded vintage aesthetic. Mostly French country furniture treated to look older than it is. Whoppah generally skips this in favour of original-finish pieces.

Space Age

1960s-early 70s futurism: plastic, fiberglass, swivels, pod shapes, white-on-white with one accent. Joe Colombo, Eero Aarnio, Verner Panton are the canon.

Vienna Secession

Austrian breakaway movement around 1897. Geometric, severe, often gilt. Josef Hoffmann's Wiener Werkstätte produced furniture and silver that still sets auction records.

Wabi-Sabi

Japanese aesthetic that finds beauty in asymmetry, weathering, and incompleteness. In furniture terms: visible joinery, raw wood grain, hand-thrown ceramics with intentional imperfections. The opposite of factory polish.

Construction & Materials

Bouclé

Looped wool or wool-blend upholstery fabric with a soft, nubby texture. Best known on Eero Saarinen's Womb chair and on every photographed Cassina sofa from 2020 onward. Hard-wearing but shows pet hair.

Burlwood

A veneer cut from the gnarled growth of a tree, giving swirling, almost galactic grain. Common on Art Deco bars and Mid-Century credenzas. Authentic burl has random, irreproducible patterning — printed-foil fakes give themselves away by repeating.

Cane

Woven rattan webbing used in chair backs and cabinet fronts. Hans Wegner, Pierre Jeanneret and Marcel Breuer all used it. Tends to dry and split after 40-50 years; rewebbing is a common, accepted repair.

Chrome-plated steel

Steel coated with a thin chromium layer for shine and corrosion resistance. The signature material of Bauhaus tubular furniture (Wassily, Cesca) and the Barcelona chair. Pitting on the chrome is the most common authenticity tell.

Cognac leather

Mid-brown vegetable-tanned leather that develops a deep amber patina with use. The standard upholstery on Børge Mogensen's Hunting chair and on most of Pierre Chapo's seating.

Dovetail joint

Interlocking trapezoidal pins used to join drawer sides. Hand-cut dovetails (irregular spacing) suggest pre-1900 craft; machine-cut (perfectly even) is post-industrial. A drawer with neither is almost certainly modern flat-pack.

Faux bamboo

Carved wood or cast metal made to look like bamboo culms. A Regency conceit revived in the 1970s. Pleasant on bedroom chairs and brass étagères.

Finger joint

Box-shaped interlocking joint, often seen on solid-wood case furniture and on edge-glued tabletops where short stock is finger-jointed end-to-end. Strong, less elegant than a dovetail.

Flokati

Handwoven Greek wool rug with a long, shaggy pile. The standard floor covering in 1970s living rooms. Whoppah lists these mostly in natural cream, sometimes in saturated dyed tones.

Japanned finish

European imitation of East Asian lacquer, built up in layers of varnish over a dark gesso ground. Common on 18th and 19th-century furniture; check for cracking and crackle around handles.

Leatherette

Vinyl- or polyurethane-coated fabric mimicking leather. Used on 1950s diner chairs and 1970s office furniture. Disqualifies a piece from genuine luxury but is a legitimate period material in its own right.

Marquetry

Decorative inlay of contrasting wood veneers, sometimes mixed with brass, mother-of-pearl or ivory, applied to flat surfaces. Hallmark of French Art Deco (Ruhlmann, Leleu) and 18th-century cabinetmaking.

Mortise and tenon

Ancient joinery: a tenon (tongue) on one piece slots into a mortise (slot) on the other, glued and sometimes pegged. Stronger than screws, used everywhere from Ming dynasty stools to mid-century Danish chairs.

Murano glass

Hand-blown glass made on the island of Murano in the Venetian lagoon. Look for furnace-mark roughness on the base and the maker's signature etched in cursive. Counterfeits abound; the Promovetro consortium runs an authentication scheme.

Patina

Surface change accumulated over time: darkening of brass, amber tinting of leather, micro-scratches on lacquer. Authentic patina increases value; harsh restoration that wipes it off generally decreases it.

Rattan

Climbing palm whose stems are bent under steam into furniture frames. Lighter than bamboo, stronger than wicker. The defining material of mid-century 'Riviera' style — Vincent Sheppard, Audoux-Minet.

Rosewood

Dense, dark hardwood with characteristic black streaks. The signature timber of 1960s Danish furniture (Wegner, Juhl). CITES-listed since 2017, which means re-export of post-2017 pieces requires paperwork — pre-2017 vintage is fine.

Saddle leather

Thick, vegetable-tanned cowhide originally made for equestrian use. Stiff when new, supple within a year. Mario Bellini's Cab chair (Cassina) is the marquee piece.

Shagreen

Tanned skin of stingray or shark, dotted with small pebble-like granules. Used on Art Deco boxes, mirrors and small cabinets. Today's shagreen is almost always sustainably farmed.

Shou Sugi Ban

Japanese technique of charring cedar to preserve it. Increasingly used on contemporary furniture for its deep black, slightly textured finish. Naturally weatherproof and termite-resistant.

Solid oak

European white oak is the workhorse of Arts & Crafts and Scandinavian Modern furniture. Pale honey when new, darkens to amber over decades. Hard, dense, and almost impossible to fake at a glance.

Solid walnut

Dense hardwood with chocolate-brown grain and occasional purple streaks. Heavy, expensive, and the marquee material for American Mid-Century furniture (George Nakashima, Vladimir Kagan). Solid walnut sounds dull when knocked; walnut-veneered MDF sounds hollow.

Teak

Tropical hardwood with high natural oil content. The defining timber of 1950s-60s Danish furniture exported to America (Vodder, Mølgaard-Nielsen). Pre-1990 Burmese teak is the gold standard; post-1990 mostly comes from Indonesian plantations.

Terrazzo

Polished composite of marble, granite or glass chips set in cement or resin. Italian invention, now used for everything from floors to coffee tables. Modern resin-based terrazzo can be thinner and lighter than the original cement version.

Tufted

Upholstery technique that uses buttons or stitches to compress padding into a diamond or square pattern. Chesterfields are deep-tufted; Eames Lounge Chair is shallow-tufted. The pattern dictates how the leather wears.

Veneer

Thin layer of decorative wood glued onto a stable core (plywood, MDF, sometimes solid timber). Not inferior to solid wood — many Art Deco masterpieces are veneered to allow exotic species. The substrate matters: solid-wood core good, particleboard bad.

Vinyl

PVC-based upholstery introduced in the 1950s. Used on Eames LCM (early versions), most diner booths, and the original Wassily armrests. Tends to crack after 30-40 years; reupholstery is sometimes the only option.

Wicker

Generic term for furniture woven from plant fibre — rattan, willow, reed, paper cord. The technique, not the material. Hans Wegner's CH24 (Wishbone) chair has a paper-cord wicker seat.

Furniture Typologies

Armchair

Seating with side arms, designed for one. Higher and more upright than a lounge chair. Wegner's Wishbone (CH24) is technically a side chair; his Papa Bear is an armchair.

Bergère

French armchair with closed, upholstered sides and a loose seat cushion. 18th-century invention, still being produced today. The visual ancestor of every overstuffed reading chair.

Bookcase

Standing or wall-mounted shelving for books. Closed-front variants (vitrines) protect the spines from light. Pastoe and Vitsoe are the canonical mid-century examples; the Vitsoe 606 has been in continuous production since 1960.

Buffet

Long low cabinet for serving and storing dining-room items. Often confused with a sideboard; rule of thumb is that a buffet is taller and shallower, a sideboard lower and deeper.

Chaise longue

Elongated chair for reclining. Le Corbusier's LC4 (1928, still made by Cassina) is the icon. Despite the name, French speakers mostly call it a 'méridienne' today.

Chesterfield

Deep-tufted leather sofa with armrests at the same height as the back. 18th-century English invention, named after the 4th Earl of Chesterfield. Buttons should be hand-tied; iron-on dot rivets give away a cheap modern version.

Credenza

Low cabinet with sliding or hinged doors, often on tapered legs. The marquee item of mid-century Danish dining rooms. Florence Knoll's 1954 credenza is the platonic ideal.

Daybed

Bed designed to also function as seating during the day. Le Corbusier's LC4 chaise, Charlotte Perriand's Tokyo bench, Florence Knoll's bench. Single mattress depth.

Dressoir

Dutch / French term for a low cabinet, somewhere between a sideboard and a credenza. Often used on Whoppah listings written in Dutch.

Eetkamerstoel

Dutch for 'dining chair'. Appears on Whoppah's Dutch-language listings.

Fauteuil

French for armchair. On Whoppah, the term tends to indicate French manufacture or French-period (Empire, Louis XVI) styling.

Lounge chair

Low, deep, reclined seating for relaxed sitting. The Eames Lounge (1956), Hans Wegner's Papa Bear (1951), and the Charles Eames Soft Pad are the genre's icons.

Modular sofa

Sofa built from interchangeable units that can be configured into corners, U-shapes, or extra ottomans. Mario Bellini's Camaleonda (1970, B&B Italia) is the modular sofa that re-defined the category — now reissued.

Ottoman

Backless, armless seat or footstool. The matching companion to most lounge chairs. The Eames ottoman is sold as part of the chair-and-ottoman set, never solo.

Pouf

Soft cushioned ottoman without a hard frame. Filled with kapok, foam or beans. Cini Boeri's Strips for Arflex (1972) is the canonical pouf.

Rocking chair

Chair on curved bottoms or springs. Eames RAR (1948) is the mid-century reference; Thonet No. 1 (1860) is the bentwood classic.

Settee

Small two-seat sofa, usually with arms. Smaller than a loveseat. The Knoll Florence Knoll settee (1954) is the elemental version.

Sideboard

Long, low storage cabinet for dining rooms. Originated in 18th-century England, redefined in mid-century Denmark. Heights between 70-90 cm; depth 40-50 cm.

Sleeper sofa

Sofa with a pull-out or fold-down bed mechanism. Italian post-war makers (Cassina, Saba, B&B Italia) produced the most refined examples.

Vitrine

Display cabinet with glass front and sides. From the Latin 'vitrum' (glass). Art Deco vitrines in burlwood and brass are some of the most collectible cabinets in the category.

Writing desk

Compact desk designed for correspondence and light paperwork. Bruno Mathsson, Florence Knoll and Pierre Paulin all designed canonical writing desks; depth is typically 50-60 cm.

Lighting

Arc floor lamp

Floor lamp with a long curved arm reaching out over a table or seating area. Achille Castiglioni and Pier Giacomo's Arco (Flos, 1962) is the genre defining piece — and the one most often counterfeited.

Arco

Arc floor lamp designed by Achille and Pier Giacomo Castiglioni for Flos in 1962. Carrara marble base (65 kg), polished aluminium shade. Authentic Arcos have a small hole in the marble base for a broomstick to lift the lamp.

Chandelier

Branched ceiling fixture with multiple light sources, traditionally suspended from a chain. Originally for candles, now electrified. Murano glass and crystal are the dominant materials in vintage examples.

Downlight

Recessed ceiling fixture that throws a narrow cone of light directly downward. Functional lighting; rarely a collectible category.

Edison bulb

Filament-style incandescent bulb with visible coiled tungsten. Originally pre-1920 technology, revived in the 2010s as a styling element. The vintage industrial look depends on these.

Flag Halyard

Hans Wegner's 1950 lounge chair, not a lamp — but worth noting because the term often appears in lighting search results due to its name. The chair uses 240 metres of woven flag-line cord.

Globe pendant

Spherical pendant lamp in opaline glass or acrylic. Achille Castiglioni's Flos Cocoon and Verner Panton's VP Globe are the references.

Opaline glass

Milky-white glass made by adding bone ash. Translucent rather than transparent — diffuses light evenly. The Louis Poulsen PH lamps and most Stilnovo wall sconces use opaline diffusers.

PH series

Louis Poulsen lamp series designed by Poul Henningsen from 1925 onward. Multi-shade reflector system distributes light without glare. PH 5 (1958) is the residential bestseller; PH Artichoke (1958) is the museum piece.

Pipistrello

Table lamp designed by Gae Aulenti for Martinelli Luce in 1965. Telescoping chrome stem, opal methacrylate shade that gathers like an upside-down skirt. Italian for 'bat'.

Pool light

Long pendant designed to hang low over a billiard or dining table. Industrial enamel-shaded examples (1900-1950) and Louis Poulsen's PH 4/3 (1966) are the references.

Reading lamp

Adjustable floor or table lamp for task lighting. Tizio (Richard Sapper, 1972, Artemide) and Anglepoise (1932) are the classic forms.

Sconce

Wall-mounted light fixture. From the medieval term for a candle bracket. Today's collectible sconces are mostly Italian 1950s-70s (Stilnovo, Sarfatti, Mazzega).

Snoopy lamp

Table lamp designed by Achille and Pier Giacomo Castiglioni for Flos in 1967. Carrara marble base, lacquered metal shade reminiscent of the cartoon dog's head. Discontinued and reissued multiple times.

Sputnik

Multi-arm starburst chandelier, named after the 1957 Soviet satellite. Brass spheres at the tips of radiating arms. Mostly Italian and German production from 1958 to about 1975.

Tizio

Task lamp designed by Richard Sapper for Artemide in 1972. Counter-balanced arms, no springs or cables — power flows through the metal arms themselves. Originally used 12V halogen; current production uses LED.

Art

Abstract Expressionism

Post-war American movement (1940s-60s) characterised by gestural, non-representational painting. Pollock, Rothko, de Kooning, Mitchell. Most works that reach the secondary market trade through major auction houses; smaller works appear on Whoppah occasionally.

Bronze cast

Sculpture produced by pouring molten bronze into a mould, usually via the lost-wax process. Foundry mark and edition number on the base are the authentication signals. Posthumous casts are valued lower than lifetime casts.

Cibachrome

Photographic printing process (1963-2012) producing colour prints with exceptional saturation and archival permanence. Common for 1980s-90s art photography. Discontinued, which has driven up prices for vintage prints.

Giclée print

Fine-art inkjet print on cotton-rag paper. Pigment inks rather than dye, archival rated 75-100 years. Lower in the print hierarchy than lithograph or serigraph but higher than open-edition digital print.

Kinetic Art

Art that moves, mechanically or with air currents. Alexander Calder's mobiles, George Rickey's stainless-steel pieces, Jean Tinguely's machines. Provenance and original wiring matter more than for static art.

Land Art

Site-specific works made from earth, stone or natural materials. Robert Smithson, Walter De Maria. Mostly outside the secondhand market; preparatory drawings and photographs do trade.

Limited edition print

Print produced in a stated, finite run. The numbering '7/50' means the seventh print of fifty. Lower numbers are not inherently more valuable, but the artist's signature is. AP (artist's proof) editions often trade at a premium.

Lithograph

Print made from a flat stone or metal plate. Original lithographs are drawn by the artist on the matrix; offset lithographs are mechanical reproductions. The two trade at very different prices — confirm which you're looking at.

Mezzotint

Intaglio printing technique that produces rich tonal gradations. 17th-century invention, mostly used for portrait prints. Increasingly rare in contemporary practice.

Monoprint

Print produced as a one-of-a-kind from a reusable matrix — the matrix stays, the print is unique. Different from a monotype (matrix used only once).

Oil on canvas

The standard medium for fine-art painting since the 15th century. Linseed-oil binder, ground pigments, linen or cotton canvas on a wooden stretcher. Look for craquelure (network of cracks) as an age signal — too clean a surface on a supposedly 80-year-old painting is suspicious.

Op Art

Optical art movement of the 1960s — geometric patterns that produce visual vibration. Bridget Riley and Victor Vasarely are the names. Many of the era's best Op Art editions appear on Whoppah's print listings.

Serigraph

Fine-art silkscreen print. Different from a commercial silkscreen poster in quality of paper, hand-mixing of inks, and signature. Andy Warhol's Marilyns are the most famous serigraphs.

Signed and numbered

On a print, indicates the artist personally signed it (lower-right pencil) and assigned an edition number. Both increase value over an unsigned, unnumbered impression. Watch out for plate-signed prints — those carry the signature as part of the image, not in the artist's hand.

Handbags

Ardillon buckle

Single-pin buckle found on Hermès belts and bag straps. Distinguishes Hermès straps from generic alternatives. Hardware engraving (HERMES PARIS) must be crisp and even.

Birkin

Hermès handbag designed in 1984 for Jane Birkin. Each Birkin is hand-made by a single craftsperson over 18-25 hours. Authenticity depends on stitching pattern, hardware engraving, leather quality and the date code on the inside strap.

Boxcalf

Smooth, semi-rigid calfskin leather used on Hermès Kelly and Birkin bags. Polished to a high shine. Scratches show easily but most can be conditioned out.

Caviar leather

Chanel's grained calfskin, named for its small-pebble texture. More durable than the brand's smooth-leather lambskin, which is why most flap bags are made in caviar today.

Chevron

V-shaped quilting pattern on Chanel flap bags. Distinct from the more common diamond-quilted variant. Chevron tends to command a slight premium on secondary market resale.

Clochette

Small leather bell-shaped pouch containing the lock keys, hanging from the strap on Hermès Birkin and Kelly bags. A missing clochette materially affects resale value.

Date code

Letter-and-number stamp inside Louis Vuitton bags indicating manufacturing factory and date. Format changed multiple times (2000s used four-character codes; 2021 onward uses a microchip instead).

Epsom leather

Embossed, lightweight Hermès calfskin that holds its shape well. Scratch-resistant, lower-maintenance than boxcalf, which makes Epsom Birkins and Kellys popular for daily use.

Guilloché

Decorative engraving with intricate repetitive patterns, often on watch dials and hardware. Found on vintage Cartier and high-end luxury bag clasps.

Kelly

Hermès trapezoidal bag named after Grace Kelly in 1956. Predates the Birkin by 28 years. Single top handle, single-piece flap, signature turn-lock closure with a small padlock.

Monogram canvas

Louis Vuitton's signature coated-canvas pattern, in use since 1896. The pattern alignment across seams, the spacing between the LV monogram and the four-petal motif, and the leather-trim quality are the primary authentication signals.

Pebbled leather

Leather with a textured, rounded surface — looks like pebbles. Can be naturally grained (full-grain) or embossed. More forgiving of scratches than smooth leather.

Raffia

Woven palm fibre used as a body material in summer bags from Loewe, Prada and Chanel. Hand-woven, vulnerable to humidity, prized for its texture.

Saffiano

Crosshatch-patterned, wax-treated leather invented by Prada. Extremely scratch- and water-resistant. The standard Prada finish for structured bags.

Serial number

Unique identifier stamped or embossed on luxury bag interiors. Chanel uses a sticker plus an authenticity card; Hermès uses a blind stamp combining a letter (year) and a craftsperson's mark. Missing or replaced serial stamps are red flags.

Swift leather

Soft, fine-grained Hermès calfskin that takes saturated colours beautifully. Marks more easily than Epsom but feels luxurious in the hand.

Togo leather

Hermès calfskin with a slightly pebbled grain — Hermès' most popular leather for Birkins because it balances durability with the soft feel buyers expect.

Vachetta

Untreated cowhide used as handles and trim on Louis Vuitton monogram bags. Starts pale, develops a rich honey patina over years of use. Water staining is permanent — Louis Vuitton handles should never be machine-cleaned.

Condition & Authentication

Authentication card

Card issued by some luxury brands (Chanel, older Louis Vuitton) confirming the bag's serial number and date. Helpful but not definitive — high-quality fakes ship with fake cards. Whoppah's curation team relies on the bag, not the card.

Certificate of authenticity

Document issued by an artist, manufacturer or third-party authenticator confirming an item is genuine. Carries weight when issued by the original maker (Cassina re-edition certificates) or by a recognised authentication service.

Curation

Whoppah's pre-publication review process. Every listing is checked for brand attribution, condition accuracy, photo quality and authenticity signals before going live. Items that don't meet the standard are rejected with feedback.

Date stamp

Maker's mark indicating when a piece was produced. On furniture, often a foundry stamp, factory mark or paper label inside a drawer. On Hermès leather goods, the year letter inside a square or circle.

Fair condition

Whoppah grading: visible wear, possible minor repairs, but structurally sound and presentable. Honest description matters more than the label — every listing should have photos of any flaw mentioned.

Foundry mark

Stamp on a bronze sculpture indicating where it was cast. Susse Frères and Valsuani are two of the most respected European foundries. A clear, well-placed foundry mark is a strong authentication signal.

Good condition

Whoppah grading: light wear consistent with age and use, no major defects. The default for most vintage listings on the platform.

Hallmark

Official mark stamped on silver, gold or platinum confirming the metal's purity and (often) the maker and year of production. A 925 stamp indicates sterling silver. Hallmarks are jurisdictional — UK, French, Dutch and Italian systems all differ.

Maker's mark

Stamp, label, brand or signature identifying who made the piece. Cassina pieces carry a metal plate inside a sofa frame; Eames chairs have a Herman Miller decal. Replaced or removed maker's marks dramatically reduce value.

Mint condition

Whoppah grading: as-new, no visible wear. Very rare for vintage pieces. When a 1950s chair is described as 'mint', expect it to have been comprehensively refurbished — confirm what was redone before buying.

Provenance

Documented chain of ownership. For art, provenance can quadruple value. For furniture, provenance from a notable collection (an architect's estate, a museum deaccession) adds a substantial premium.

Restored

Indicates work has been done to bring the piece closer to its original state — refinishing, reupholstery, replaced hardware. Honest restoration is positive; over-restoration that erases patina is value-destroying.

Very good condition

Whoppah grading: minor signs of age and use only, no significant flaws. The most common grade for curated mid-century pieces on the platform.

Marketplace & Circular

Auction

Sales mechanism where the highest bidder wins. On Whoppah, auction-style listings let buyers place bids that the seller can accept, counter or decline. Distinct from a fixed-price 'buy now' listing.

Bidding

The negotiation feature on Whoppah listings that allow bids. Buyers propose a price below the listed amount; sellers respond. Most successful bids land at 80-95% of the asking price.

Buyer protection

Whoppah holds the buyer's payment until the item is received and confirmed in described condition. Buyers have a 48-hour window after delivery to flag any discrepancy with the listing.

Carbon saved

The CO2-equivalent emissions avoided by buying a secondhand piece instead of new. For a wooden sofa frame, typical savings range from 80-150 kg CO2e. The figure varies by category and lifecycle assumptions.

Circular economy

Economic model that keeps materials in use as long as possible through reuse, repair and resale. Whoppah's existence sits in the 'reuse' layer — every listing represents one item that doesn't need to be newly manufactured.

Consignment

Selling arrangement where the owner gives the item to a marketplace to sell, with the marketplace taking a percentage on sale. Whoppah's seller-direct model is closer to a managed marketplace than a traditional consignment shop.

Curated marketplace

A marketplace where every listing is reviewed before publication, as opposed to an open marketplace where any listing can go live immediately. Whoppah is curated; Marktplaats is open.

Deadstock

Unsold new inventory from a retailer or manufacturer — never used, often in original packaging. Treated similarly to vintage on Whoppah when it concerns discontinued models.

Escrow

Whoppah holds the buyer's payment in a neutral account until the buyer confirms receipt and condition. Funds are then released to the seller. The mechanism that makes anonymous secondhand trading safe at scale.

Insured delivery

Shipping that includes insurance against damage and loss in transit. Whoppah's partner couriers (Brenger primarily) carry insurance suited to large or fragile design pieces — important for art and oversized furniture.

Pre-owned

Polite synonym for 'used'. Common in the luxury handbag and watch markets. Whoppah uses 'secondhand' and 'pre-owned' interchangeably.

Provenance check

Process of verifying that an item's chain of ownership is plausible and documented. For high-value art and bags on Whoppah, provenance is part of the curation review.

Resale

The secondary market for goods originally sold new. The resale value of designer furniture varies enormously by brand: a Cassina Maralunga holds 60-80% of new retail; an unbranded sofa from the same era retains 10-20%.

Showroom model

Furniture that's been on display in a retailer's showroom but never sold to an end customer. Technically unused, often substantially discounted. Whoppah has a dedicated 'Showroommodellen' section following the 2024 acquisition.