![]() I think that I'm looking at getting a 1944 Photographic lens version of the 508mm f/5.6. ![]() ![]() I found your post on another forum, and another member who is also a member there, directed me to this. Posted: Wed 10:52 am Post subject: Klaus, thank you! Voigtländer Apo-Macro-Lanthar f2.5 125mm SL Pentax Ultra-Achromatic Takumar f4.5/85mm So to be complete, here the serial numbers before 1942: I am not sure what happended after 1960 though. So a lens with UF 743 means a lens made in 1942 and it was the lens#743 made in that year. Letter is significant for the production date, the second is a code class for lenses, microscopes etc. Then they changed it to some cryptic two letter + digits scheme. Up to 1942 Bausch & Lomb, Rochester USA used a numerical scheme when all of a sudden Posted: Mon 10:00 pm Post subject: Bausch & Lomb Date Code (serial number scheme)
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