Could anyone help identify these stampings?

[whcoyote]

Originally Posted by Brad

These are German military proofs found on DWM Lugers manufactured 1914-1918.

The SU4 proof I am not sure about. Perhaps a Nazi Era proof. Someone will be along that knows.

Not all of them are proof marks. The three on the left having a Crown/Gothic letter are acceptance stamps. They were placed there by an inspector after having passed an inspection procedure. The eagle to the right is the firing proof. It was placed there, on the barrel and the breechblock after successful proof firing.
Bob