Need help identifying mark

[alvin]

Originally Posted by mrerick

Just speculation, but I wonder if WM could relate to "Weimar Mauser" and "RM" to "Reich Mauser" or something similar...

No. "WM" stamp of same style not only appears on post WWI gun, it also appears on pre WWI gun.

The earliest "WM" grip that I have seen is on commercial flatside Mauser, circa 1900. The last WM grip that I've seen was on so call French Gendarme variation, circa 1919.

No Weimar on guns. The official name of the postwar republic was not Weimar. It's only a nickname used by historians.

A clearer picture of WM copied from Hermann Historica: