A Potential Oddity

I have a thing for old sewing machines. I like straight stitch Singer 66s and 99s. I like ones that can be put in a treadle base.

Came across one today. The cabinet is excellent, but it’s mid-century modern. It’s an electrified version. But...

That serial is strange.

It’s in good shape. If I can figure out that serial weirdness...