First Post, and an Open Ended Question

[Edward Tinker]

Originally Posted by David-NY

..

What I'm more interested in is the rest of the gun. All of the remaining parts appear to match. The number "13" is stamped several places, like the back side of the trigger plate. Is this a 1913 Erfurt? How could you tell what year it is from?

no

numbers on the rear 'can be' related to the sn of some years (See FAQ)

Otherwise, they are just numbers or last two of the serial number

Looking very close you can sometimes tell what manufacturer made it / i.e DWM, Mauser, Kreighoff, while Erfurt and Simson parts are acceptance stamped (not proofed in most cases)

[David-NY]

Originally Posted by Edward Tinker

Looking very close you can sometimes tell what manufacturer made it / i.e DWM, Mauser, Kreighoff, while Erfurt and Simson parts are acceptance stamped (not proofed in most cases)

Erfurt. The toggle is marked Erfurt and it matches all other parts except for the barrel and extension. The acceptance stamps are the Erfurt 1908-18 stamps on the FAQ. Now interestingly, there is also an "RC" stamp on the front of the trigger guard, which appears to indicate an Erfurt arsenal rework of some sort. It has a hold-open (which also matches) and a lug.