I'd like to learn something. Here is my early Deumer on the right, compared with the cross that started the thread on the left. Did Deumer make a different core earlier in the war, maybe even a different frame? To me, I see differences in the dates of both crosses...
it could be a Sedlatzek EK I, too. The type of screw back is distinctive for Sedlatzek. But the EK's by this maker have IMO a Deumer front design (frame and number design).
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