Looking closely at where the power cord goes into the cord set block on the right back corner, it looks like the cord has pulled out and exposed copper wire. That may be an artifact of the photo conditions, but I would check that carefully. I have replaced plugs on several machines, it's easy. The big box home repair stores have plugs in several configurations. For that machine, I would get a two prong plug. Cut the plug off the wire, strip the insulation off the wires, follow instructions with the plug to clamp the wires to the terminals and the cord into the plug.
An easier fix is to order a new cord block with included power cord and plug for $13 US dollars
https://www.shop.sew-classic.com/Cor...143-SCE143.htm
I would wonder if this is an early clone, in 1940s, only because there is no feed dog lowering dial on the right front of the bed. That seems to have been a common improvement in the Japanese "15 clones" later in production.