The design of the vienna nr. 9 / 209 chair dates from 1900. It was a favorite of many famous architects/designers like le corbusier, poul henningsen and mart stam. This chair was produced in the 1970s by zpm radomsko in poland. Zpm radomsko was a after world war ii nationalized thonet factory. height armrests appr. 70 cm (front) - 77 cm (back). I have official proof of authenticity such as vintage catalogs, designer records, or other literature sources and take full responsibility for any authenticity issues arising from misattribution