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 #1011 produced at the FujiGen Gakki factory in Matsumoto, Nagano, Japan
Auctioned on eBay by eBay user svintage (USA); at that time the active pickups had been replaced by passive ones, and the low Z output disconnected
Auctioned on eBay by eBay user music*geek (USA); at that time he had installed a Bartolini NTMB 3-band active preamp, volume (push/pull active/passive), blend, mid (push/pull freq. select), and stacked treble/bass, XLR jack replaced by second 1/4" jack