Here's a picture of mine for comparison with the picture in post #11: my shutter looks a size larger, and it's not very clear but it looks to me like the tele-dynar shutter goes to 250, like a Compur 0 does.

I've been vaguely interested in these lenses for ages but never seen one at a reasonable price, so if you find a shutter it fits I'll be interested to see what it's like.