Singer Bak Foot Control And Harness
This is the foot control with harness and it is known as the BAK type for Singer models. It has 3 pins and the connection/socket to machine is slightly banana shaped...!
It is for the very old black and gold Singer machines with the balck motor unit hanging from the back. Please change the fiiting is the same as the one on your model.
Th old part number was 988274646
Seems like a good replacement for the original which had become electrically unsafe due to age. Looks like it might not be as durable as the original but works well. Probably the only option for a 60 year old machine.