Originally Posted by
cyccommute
I’ve seen a lot of fixed cups going all the way back to cottered cranks and I can’t recall ever seeing one with that configuration. The cup you show is a common adjustable cup but not a fixed cup.
No, many British 3-speeds used cups with the 5/8" raised ridge on both cups. Raleigh Sports and Superbe 3-speeds often have the fixed cup painted:
