New guy with a 41 byf marking question.

[Lugerdoc]

The marking in question appear to be post WW2 DDR proof marks, which are usually stamped on the left receiver above the serial #. There appears to be another marking in that area aft of the serial. Clear close-ups of both areas would be helpful. If your barrel has a C/N proof and perhaps a 3 digit date below the C/N, this could be the reason for the E.German reproofing. TH