Front mount shutters to mount to the front of Barrel Lenses
These are 2 old round shutters similar to Packard shutters, although no name on these. They use an air hose connection and work like Packards: squeeze bulb and take your thumb off and the shutter will remain open, then squeeze without thumb on hole, cover hole and the bulb will suck the shutter closed. Quick (or vary the timing) squeeze will give various "instant" timing. These both work well.
Large One: shutter hole measures ~2.5 inches (63mm). Lens mount size measures 2 3/8 (60mm), but you can enlarge it.
Smaller One: hole in shutter measures 2 inches (50mm). Has a lens clamp on the back measuring 2.5 to 2 inches. Has a piece of tape on one of the blades, but works fine.
I also have nice air bulb & tube for $20 additional.
$45 each incl. US shipping, or $79 for the pair including US shipping. $89 for international. Paypal accepted.
These would be fun for experimenting with old lenses.
Jon