Carl Zeiss Jena is East German manufacture, that is why you don't find it in the Zeiss catalogue (it isn't Zeiss). It is also almost certainly post-war, as there was no East Germany before WW2.
Carl Zeiss Jena made inexpensive optical equipment for export to the West. The optical quality was fairly high, but not as good as the West German Zeiss, and the finish was less good.
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