A question for the local experts: were the cups used on the 1950s era Stronglight cottered bottom brackets the same as those used on the stronglight non-cottered bottom brackets? That is, could the cups from the "competition" bottom bracket be used with a "model 34" axle?

I ask because I would like to use a Stronglight model 34 bottom bracket in a frame with BSC threaded bottom bracket, but cannot find BSC cups sold with a cottered axle. However, they are common with the square taper, non-cottered axle. If they are interchangable, I can mix and match.

Thank!!!