I recently purchased a 7" Goerz Dagor in an Optimo 2 shutter and am hoping that the lens can be used in its current shutter before finding a new one for it.
The Optimo does work as far as I can tell: one button sets the shutter, the other releases it, and the shutter speed dial does seem to affect the speed. But there are 2 holes in the bottom, at about the 5:00 & 7:00 positions, that I'm not sure of.
I have a copy of the old Inter-Lens manual, which shows an Optimo 1a shutter. The 1a has only 1 of the 2 bits at the bottom (5:00) and describes it as a "retarding pump".
You can see an online copy of this book here btw:
So, finally to my questions:
1. Does anyone have any insight into the workings of the Optimo No. 2?
2. Will this work ok without the missing bits?
3. Anyone have a dead Optimo No. 2 for parts?