1960's Side Chair By Antonin Suman For Ton - Double Cut Out. Antonin Suman joined Thonet in 1949 and later moved to the Thonet offshoot Ton when the firms split during the post-war political upheaval in the region. This chair was produced by the famous Czech firm Ton, still trading today and producing beautiful chairs. Suman was a prolific and revered designer and this chair is a beautiful example of his craft. Seat height 44cm. This piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution