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 #772 produced at the FujiGen Gakki factory in Hirooka, Nagano, Japan
Auctioned on eBay by eBay user kunoichi_music_square (USA?)
Auctioned on eBay by eBay user good-vintage-japan (Japan)