Piano-System (unisonoric)

(Collection Oriwohl, Nr. 220)

Manufacture: Co. Hugo Stark, ca. 1930er Jahre

On both sides, it is a single-tone instrument without chord keys. It was built by the company Hugo Stark, as well as the bandonion Chromatiphon. Whether it's a further development by Hugo Stark or a commissioned work is unknown.

A similar instrument was patented by the company Paul Jähnert from Triptis on May 3, 1931. (Graf, p. 449)