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 #891 produced at the FujiGen Gakki factory in Hirooka, Nagano, Japan
Bought by Slawomir Sobczyk (Poland) from a Polish friend of his; date is approximate
Latest known owner Slawomir Sobczyk (Poland)