Okay  Where do I sign a petition for the elusive HEISLER ??

Every year a little older and still nothing about the ever elusive HEISLER...

I picked up a Rivarossi 5104 turntable the other day. It has been around sitting on a dealer's shelve for a very long time. Years and years..
Looking for information as there wasn't any instructions with in ! Someone probably borrowed them long ago, (wink wink).

Like to know whether it used ac or dc to run the drive motor ?
The red control box has one plug with a yellow, green , black and red ..
One side of the controller has two males pins yellow and black.
The other side has two female sockets yellow and black.
Any help would be appreciated very much.

Cheers, Darryl