Hello diser ... don't feel bad re CLA. Most folks on Flickr either disregard a proper CLA or attempt to do it themselves. Amateur photographers instantly transformed into certified camera technicians. I think not. Few realize the dual insurance values of a CLA. First off the camera will produce high...

You list the Billy0 from 1932 to 1937. I think the first was 1933. They hit the market with the Solinar lens which was a Tessar clone. The Zeiss Tessar patent of 1902 stayed in effect until the end of 1932. Beginning in 1933 Agfa and twenty other optical companies produced their own version of the T...

The correct term is CLA (Clean Lubricate Adjust) and surely needed. The front element of the 4 must turn in order to focus. It is common for Agfas to seize up. The III is the top of the line: Solinar / w Synchro-Compur and a coupled Range Finder. The top of the line is not easy to find so I feel tha...