Thanks I gathered this by the prices, one I'm looking ats a 1917 DWM war bring back in same family since. Has tiny bit of nickel flake at slide and pin. Wants $1000.00
Guy on gun broker has 1937 very nice nickel but wants $2000.00
Rock island as 1917 engraved DWM don't know price.

What I gather is this American GIs liked to add coin Germany or back home. Europeans liked to engrave particularly the Germans with oak leaf motifs .