Industrial Drafting Automatic Adjustable Stool, Kewaunee Mfg. Drafting Stool With Backrest, 1930s, USA. The Height of The Stool is Adjustable, by Simply Sliding the Seat Up or Down. The Seat Height Range is from 47 cm to 67 cm. Backrest is also Adjustable. The Seat is Made From Solid Wood, the Backrest and Base of The Stool are From Metal. The Original Manufacture’s Label is Affixed to the Backrest, Original Operating Instructions Label is On The Bottom of The Seat.