What is the age of a German Derringer serial number 60712?

I was told by a gun collector that a five digit number on an imported derringer is not a serial number- it is a lot number ( a serial number should be at least 6 digits) what about the proof markings on the gun? can this identify the company or date or just the country of origin?

First answer by ID0410723782. Last edit by ID0410723782. Question popularity: 1 [recommend question]