This is a classic c1955 24x35mm image.Body release, viewfinder, advance & rewind knobs all above the top plate. Sync post on the front below finder. Non interchangeable Trioplan f2.9/50mm in Meyer Optic Red "V" VEBUR 1-250 B Made in Germany The case is marked 4 so they match.I loaded a film to test the shutter speeds the are good.