There weren't very many 1916 Colt M1911 pistols to begin with, and far fewer were marked "S" on the receiver, slide and barrel. The "S" mark was used by temporary inspector Strong, apparently in Hosmer's absence.
No barrel markings on the top of the chamber. "S" mark on the back of the hood extension.
The "P" proof is stamped on the back of the barrel lugs. Wear patterns match on the breech face of the slide.
The pistols shows wear patterns from a M1912 holster. Obviously, in 1916 there were a lot more M1912 holsters in the system than new M1916.Information
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