BSA, Raleigh, Schwinn and Zeus (and maybe Hirondelle/Manufrance) were, at some point, producing almost all the parts for their bikes.
BSA and Raleigh had huge factories making their components and frames.
What's the story with Pre-war Schwinn Paramounts and Superiors? Did they make their own parts, or did they have them made for them?
I ask because their hubs and cranks look a lot like the competition's.
Amir Avitzur
Ramat-GAm, Israel