I'm a keyboard collector among many things yet they are my biggest collection. I've seen some fun piano based electronic instuments. like electronic pianos with phono or even as I have a stylophone piano.
this thing takes the cake though.
guessing the pickup cart is reversed .
Radio museum has a better image.
http://www.radiomuseum.org/r/spiegel_aircastle_pam4pam.html?language_id=2
PAM-4 Spiegel inc. Aircastle piano record player
Cheers,
recordboy
recordboy