Nice  used Hohner  Diadonic button accordion in C/F . I dont know the model name. The instrument is in nice used condition, but the leather straps at the side  to fix the belly are missing. . The belly is tight , but the instrument looses little air somewhere else without making sounds. There is some oxidation at the metal corners of the belly. .   The instrument measures approx. 11" x 11 "x 6" . (28/28/15cm) .   The instrument may need some   service and cleaning. It once was sold by "Fischer, Bremen" (north of Germany)  Shipping to USA or Canada would be 59 USD. I will ship worldwide!