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 #812 produced at the FujiGen Gakki factory in Hirooka, Nagano, Japan
Bought by Miguel Trapero (Mexico) from Fernando (Mexico); at that time the output jack had been modified
Latest known owner Miguel Trapero (Mexico)