Very rare folding chair, model Start, designed by Konstantin Grcic in 1993 for Cappellini Italy.
I only found 1 online and that one is in the collection of the Museum Boymans & Van Beuningen in Rotterdam.
The idea of the chair is based on cinema chairs and a design of Jean Prouve.
There's 2 versions of the chair, 1 with and 1 without armrests.
The chair is fully made of black metal.
It is in good original condition. Some normal traces of use..