I have one that I bought at a camera fair. The dealer had no idea what he was selling and I had no idea what I was buying but at 15 ukp it was worth a chance. It's a wonderful little lens, I couldn't believe that it covered 11x14. I have a Copal 3 shutter and the male screw thread at the rear of the shutter is 62mm so I bought a step up ring with a female 62 mm thread so that the rear of the shutter would screw onto the front of the step up ring and Super Glued the ring to the front of lens. All I have to do now is screw the shutter to the front of the lens when I want to use it. I've used this method of lens mounting on an unknown brass magic lantern lens and other process lenses such as Repromasters and Eskofots.