The ON Armchair is an original reedition licensed by the Oscar Niemeyer Foundation, the holder of the copyrights, and produced and exclusively commercialized under the ETEL registered trademark. The piece bears dual certification of origin and authenticity, issued by both the Oscar Niemeyer Foundation and ETEL.

The ON Armchair was originally created specifically for the SESC Copacabana Hotel, designed by the architect in the 1980s.