4/8/21 - This is an original 1941 dated 4mm barrel insert and loading spoon for the Walther PP pistol. The screw cap is blued and serial numbered 3331. Above that is a "41" date stamp. Research finds that a German company RWS had a patent for this design during the WW2 era. Makes for a nice addition / supplement for a 7.65mm Walther PP pistol collector. The bore has strong rifling but there is mild patina and residue within the grooves.