Here's another one I can't identify (yet). It's a Goerz Doppel Anastigmat Series III/0 F=120mm, serial no. 108507.
It doesn't look like the DA's Series III/0 I found so far and the F-stops are 4,6-6-12-24-48-96-192.
There is a slot and internally there is nothing pointing towards a perhaps missing iris diaphragm.
Anyone have a clue?
Thanks in advance,
Peter
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