>>3360992As a follow up to the maybe 1 person interested: this has a compound 4 size shutter, max speed 1/75th is marked. That said it’s a continuous speed shutter, because it works using a piston with air pressure to determine shutter speed. When you cock the shutter, it pressurized the shutter piston. The speeds marked on the shutter are completely wrong, but that means I can either treat each marking as a half-stop slow, or turn the marking 1/2 way to the next speed. It’s increments of 1, 2, 5, 10, 25, 50, 75. The actual speeds at those markings are 1.6 seconds, 4/5, 3, 7, 15, 25, 45, and then moving the shutter speed past 75 a hair will yield about 1/60th of a second. A bit annoying, but entirely usable and of 100 shutter cocks only 1 shot was actually off the other samples, which I assume was because I pressed it weird or something.
Another interesting point: if you put the shutter in bulb or time mode, and cock the shutter, you can destroy the whole shutter. Both work without cocking the shutter.
As a #4 shutter it is much larger than a modern Copal 3 (allows lenses to be almost a stop faster), but not even the largest. An Ilex 5 or compound 5 will be one stop even larger. After that the only way to get bigger shutters is to get a dedicated Packard shutter.
