Wonderful camera, I've had it for a 5 years but just don't use it enough. Mostly a LF shooter.
This is information I got from rolleiclub.com based off of the serial number on the camera. 1283379 Made between 1951/1954
June 1951 - March 1954Serials: 1.200.001 - 1.474.999
Taking Lens:
Zeiss Jena Tessar 3,5/75
Zeiss Oberkochen Opton 3,5/75
Schneider Xenar 3,5/75
All with filter Bayonet I
Finder lens:
Heidoscop Anastigmat 2,8/75mm
Bayonet I
Shutter:
Compur - Rapid, 1 - 1/500 sec., T & B, self timer. X sync.
Film: 6x6: B II 8 (120) & 35mm with Rolleikin 2 adapter set.
Film Transportation: winding lever with auto stop, no red window, film pressure plate with black color coating. Lever also cocks the shutter. Double exposure prevention. Dimensions: 14.3x9.0x9.5cm
Weight: 970 grams