Yes, I expect it's pretty old. It was in the car before I received it. I'm thinking someone on the forum will recognize it eventually. It's 10" and approx. 3,000 rpm stall at best guess.
I didn't think it would be that tough. hint: it's old and it's non-lockup. Maybe one of the long time owners will recognize it. I personally have no idea but just curious.
My car had an old art carr in it and the part number was similar with a letter after it, but it had "cpt" stamped in it. The mounting ears were similar but not nearly as crude. Maybe this was a prototype?