I am looking for two parts for (what I believe is) the late style
Cable piano transmission. Specifically, I want the two parts that
connect the air motor crank shaft to the main shaft of the
transmission.

The part that goes on the crankshaft is a hub with two elongated pins
and the matching part which is mounted on the end of the transmission
shaft is a "collar" with 2 protuberances that project out of each side.
When installed the protuberances match up with the pins to drive the
main transmission shaft.

It is arranged so that the transmission shaft doesn't just rotate
but it also can move right and left (to shift from play to rewind)
while continuously in contact with the pins. See the photos at the
links below.

Also, does anyone have a complete Cable Euphona stack?

Thanks,
Dave Krall
Hammond, Indiana

 [ https://www.mmdigest.com/Attachments/23/03/24/230324_065913_Cable%20piano%20transmission1.jpg
 
 [ https://www.mmdigest.com/Attachments/23/03/24/230324_065913_cable%20piano%20transmission2.jpg