I'm planning to someday make, or let someone make, new Bergheil bayonets with different holes to fit smaller shutters.
I wonder if it's possible. I have a 168mm Goerz Dagor, and it came in a Compur 1 that is too large for the 6,5x9 Bergheil. The shutter doesn't work (and can't be repaired), so I keep the lens cells in a tobacco tin waiting for a new shutter. But the threads are special, so they don't fit any shutter I've tried.
Originally Posted by renes
I also have a 130mm Dagor, which came in a Compur 0. I bought a cheap Voigtländer Avus 6,5x9 for it, and it was a direct fit.