Unit Mark G.K. on 1914 Erfurt...

[Don M]

Originally Posted by nick.helms

And Don, I think I must me missing something on your sizing for the pistol number, if I look at 2.1mm with a ruler that seems smaller than the serial number under the barrel and I know I've seen unit marked pistols with those weapon numbers larger than the serial number. I know I'm probably missing something obvious here...

Nick, the 2.1 mm specification is for the size of armorer's dies to be used for weapon numbers on Prusssian military and later police weapons. The serial numbers were applied by the factory and I don't know what specifications existed for their sizes.

These specifications applied to Prussian weapons. The police of other states (such as Hessen) did not necessarily use these sizes.