I have just bought this Ernemann Bob 1 for £10 and quite impressed by the build quality and functionality. These are the details I have gleaned so far about my Bob 1: - EISS logo - Art Deco case styling - Body 835 653 - Back 653, 5692, hand written V349 - Lens: Ernemann Detektiv Aplanet f= 10.5cm 422095 - Shutter 813010... Possibly a Chronos - Kodak 120 film spool installed . Mine is wooden so probably pre-1911 when bodies became cast-metal but then again Art deco period is 1908 to 1935 and it looks to me like a later deco style, than 1911? . The Bob 1 is considered "somewhat rare" by collectiblend.com" What really intrigues me is the logo does it stand for "Ernemann Zeiss"?... EISS. This would mean it was a collaborative venture acknowledged by the logo prior to the merger of Ernemann with Zeiss, which occurred in the late 1920's. After the merger and when old stock was used up I assume everything was labelled as a Zeiss? Any ideas about the exact year and its true value and rarity?