While looking at the data of the older Schneider lenses, I noticed that the lenses are presented with different shutters for the same lens. For example, a Symmar-S 5.6/150mm can be found with a Compur 0 or Compur 1, Prontor 0 or Copal 0. Was this typical at that time and did other manufacturers offer the lenses in different shutters, or is this something only Schneider did ( since they are the only ones that have all this data about the older lenses ) ? Just curious about what is factory made and what is adapted by the users out there.

Regards, Stefan