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 #302 produced at the FujiGen Gakki factory in Matsumoto, Nagano, Japan
Bought by Heartfield Forum user ctreitzell (Todd Reitzell) (UK) from the original owner; at that time the control knobs had already been replaced by chrome speed knobs; date is approximate
Latest known owner Heartfield Forum user ctreitzell (Todd Reitzell) (UK)