I have the same machine in a Martha Washington Cabinet. It has an electric plug on the right side behind the machine. I'm still baffled about that one. I bought it as a project and haven't gotten to it yet. I do know they are rotary machines and were made after the rotary machines with the painted decals.
Go to this site
http://www.mygrannysatticantiques.co...g_machine.html
There's one that that sold for $350.
One thing to note as you are fixin her up. The wheel turns away from you.