This is what it looks like:



It's not an awesome photo, but it clearly shows how it goes together. There's a lot of pics of new Hatta cups out there that look just like that, except for being brown. I initially thought it was a lip cast into the cup that was crimped down to hold in the balls, but after cleaning you could see it was instead a pressed-in ring, as well as the additional writing on the ring. There's nothing on the outside of the cup to indicate brand, and the spindle was unmarked.

I'm going to clean the whole thing up real good, regrease it, and reinstall it, just to gauge how smooth the races are. The spindle looks good, and I think the bike is low-miles, just high-rust, so the cups should probably be as good.