Cosina has made SLRs cameras (and now rangefinder cameras) for a lot of different brand including its own Cosina and Voigtlander brand. That was the case of the Olympus OM2000, the Nikon FM10, the Nikon FE10, the Voigtlander VSL 42, the VSL 40, the Bessaflex TM, etc, etc. Looking at the pictures of the Contax S2 and Contax S2b I have realised that the Contax look like being part of the same family. That the Contax is made of Titanium is not an issue since Cosina has not made only cameras made of plastic. The lightmeter of the Contax seems to be a similar LED meter. Everything technically looks like camera made by Cosina. Only the shutter seems to be different and is not one of the three shutters put in Cosina's cameras.