AM601365 made between 1955 and 1959, like me.
December 10, 1956 50000 machines were allocated for this serial number range.
When I tried to put the foot controller with the machine, I couldn't figure out which side of the cord to put on pin 1 and which to put on pin 3 of the 3 pin terminal. And then I realized I didn't have a power cord to go from the machine to the wall outlet. I've found where I can order this part online but still don't know what to do with the foot controller wire. Anyone know?