What kind of a plug is this? Jones? Cinch? Something else?

[glebert]

http://www.accordionservice.com/

How could a guy looks like that not be helpful?

Well, if you said something disrepectful about accordions, maybe...

Thanks for all the help everyone!

[glebert]

Just in case the chap at www.accordionservice.com doesn't have the mating connector, I found a mate here:

https://in.rsdelivers.com/product/te...nector/1006251

Not sure what monetary form Rs is though.

Thanks a ton! RS looks like they are out of India, so Rs is presumably rupees(?). That price would be about $20, which is probably what they go for.

[glebert]

Saw an old Thomas Transistor organ at Goodwill today for $5, thought about getting it just for the pedals and not have to worry about the connector on the Elka unit, but the spacing on them was kind of tight, they were at an odd angle, and I really didn't want to deal with disposing of the rest of the corpse afterward. If it had been a tube model I probaby would have gotten it for extra parts.