Below you will find an overview of the known dated events in this instrument's history. If you have any to add, please feel free to contact me.
Heartfield-related instrument #502 produced at the FujiGen Gakki factory in Matsumoto, Nagano, Japan
Bought by Peter Rankin (USA) from someone in Kansas (USA)
Latest known owner Peter Rankin (USA); at that time the control knobs has been replaced by different ones