The eagle stamp - preliminary proof of the unfinished barrel, before 1939
crown over U - definite proof of finished gun
crown over W - proof for choked barrels
The top pictures seems to show a date stamp of 1 38, next to a crown over S for smoothbore barrels.
I don't see the Suhl mark , it would be a crest with a pick in a sole.
Sorry, mapsjanhere, I was under the impression that the Crown/S mark was for black powder, as per the Blue Book. Is that not right?
I read the date as 14.3.6, which I thought was March 6, 1914. When I said the Suhl proofmark, I meant the Sauer mark (standing man with spear).