40351844
. It is serial number 350915. It needs a little cleaning up and the carry case is worn. The lens are heidoscop-anastigmat 1:3.1 f-7,5 cm no. 356137 and Carl zeiss jena tessar 1:4,5 f=7,5 cm. nr. 1573555. It operates but needs to be cleaned. Below is a little information i found on the web.
Model 6RF 620
January 1932 - January 1934 , 4926 pieces
Model 6RF 621
February 1932 - January 1935 , 38248 pieces
Model 622
November 1932 -- May 1938 , 51894 pieces
Serials : 200.000 - 567.000,
but some cameras up to 601.750
Taking Lens :
Zeiss Tessar 4,5/75 (model 620)
Zeiss Tessar 3,8/75 (model 621)
Zeiss Tessar 3,5/75 (model 622)
Filter size 28,5mm
Finder lens :
Heidoscop Anastigmat 3,1/75mm
Filter size 24mm
Shutter :
620 & 621: Compur, 1 - 1/300 sec., T & B.
622: Compur - Rapid, 1 - 1/500 sec., T & B.
Film : 6x6: B II 8, B I 6 (120) & 35mm with adapter set.
Film Transportation : winding lever, film counter; red window for spooling to first frame on bottom of back, film pressure plate without color coating. Some of the earliest cameras have the red window on & under the back. Manual shutter tensioning.
Dimensions : 14.3x8.6x9.0cm
Weight : 773 grams (620), 803 grams (621), 778 grams (622).
