This designation was used during the First World War and has nothing to do with Nazism. A stamp for working in leather. 50,8 X 44,8 mm. Condition as pictured - very good.
Perhaps, I'll send you more photo. The item "50,8 X 44,8 mm Waffenamt Skull Proof Stamp Punch k98 MG42 P08 P38 Holster" is in sale since Monday, May 6, 2019.This item is in the category "Collectibles\Militaria\WW II (1939-45)\Reproductions\Germany". The seller is "fudosan1" and is located in Ostrów Wielkopolski. This item can be shipped worldwide.