Well, I dug through an OLD (70's) bike repair manual I had forgotten I had, and it listed the different Bendix hubs. Upon closer examination and cleaning I discovered the hub is an RB2 - single speed. So I answered my question.
I'm one for hard luck cases. This thing needs alot of love, but I think I can bring it back to good riding shape. Under all the dirt, grease, and rust, the chrome still REALLY shines. So I think I'll rebuild it and sell it as a classic - some college kid will love it. Maybe I'll post some before and after pics.
Thanks for all the tips!