The ones made by this maker are all low numbered. It range probably from 8000 to 9999. It's a fact that -at least as far as I know- there is still no example by this maker found togheter with its bezitsurkunde. The manufacturer Franz Otto also lost his RZM lisence on 15/10/1935.
However, quality and craftmanship is very good and there is no real reason to doubt about their originality. I have one example in my own collection.
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