Need Help 1939 Mauser proof marks with numbers

[alanint]

Originally Posted by showell57

I just picked up a1939 /42 mauser luger. I'm new to the Luger world and was wondering if anyone can tell me what the numbers represent under the first two eagle on the receiver. The third eagle has the swastika under it . The two numbers are both the same "63 "

Welcome!
These all sound like normal proofs but c
lear, closeup photos would help.