I'd never noticed that these existed, but they're in the catalog...
eBay item 200403311035
NOS from 1958. Probably pretty scarce, and maybe a great (albeit expensive) source of parts if you're trying to piece together another BB from that era with bad cups and races.
Not mine. No known relation. Blah, blah, blah.
So, what crankset would this part have been paired with, anyway?
Scott Minneman
San Francisco, CA USA