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Early to mid-production barrels often bear the "HS" (High Standard) marking, sometimes accompanied by a "P" on the side of the barrel lug. Other barrel makers used during the period included "F" (Flannery).
The pistol frame contains critical military acceptance stamps, serial numbers, and inspector proofs. Ordnance Escutcheon (Crossed Cannons) Right side of the frame, behind the grip panel. remington rand 1911a1 markings
: Found from serial number 1,015,000 through the end of production in 1945. Layout : Expanded into three distinct lines. Early to mid-production barrels often bear the "HS"