I have just posted two photos of a camera whose only indication of a brand are "F. Deckel," "Semi-Sport." The lens is a Xenar f:3.5 F=7.5cm Schneider-Kreuznach. I cannot find any information other than the post in "Camerapedia" that says that F. Deckel was a maker of machined parts - including a leaf shutter for camera makers. I have also discovered that the shutter speed of the early models was set by moving the outer ring and that, on later models, the shutter speed was set by moving a marker around the ring. The camera takes 120 film and has rather advanced features regarding the loading and advance of the film. I am posting a picture here as well in the hope that someone might recognize the camera. My son believes that the camera may be a prototype made by F Deckel to sell its shutters. Any thoughts?