Miss B chairs by Tito Agnoli for Pierantonio Bonacina.
You could buy this chair with or without armrests. With armrests, they are even rarer. I have 2 for sale. The lace in the seat of 1 chair is broken and has been fixed with staples (by myself). The other one is completely intact, and while the chairs show signs of use, they still look fine. Addition: I now have an official connector for the broken lace..
..
Specifications
ConditionGoodColorsBrownMaterialLeatherNumber of items2BrandPierantonio BonacinaHeight82 cmWidth50 cmDepth53 cmSeat height45 cmSigns of usageCrack