1920s, I b'lieve. Could be mistaken. CZJ produced them for a while after taking over Goerz. Goerz American made them until nearly, if not exactly to, the end. I have a 45/9 CZJ Goerz Dagor, not cataloged, one of 26 made by CZJ. Covers 2x3 but I prefer my 47/5.6 SA. Easier to focus and there's a center filter for it.
Will, if you don't know what the list is, ask. Read Fabre. He wrote in French but you don't need to understand French to figure out the lenses.
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