Originally Posted by
IanG
Schneider only used the 0S and 1S shutters after their release up to their switch to th faster top speed Compur Rapid, and later post war Synchro Compur. The only difference between the 0S and 1S is the Self release and they are standard #0 & #1 fit.
There are NO non standard Compurs in pre-WWII Schneider catalogues.
When Compur switched from the Dial-set to Rimset shutters they wanted to standardise the shutter sizes as it had been expensive making non standard sizes for some lenses.
Ian
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