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Colt Model of 1911 U.S. Army .45 ACP - Serial Number 12218 (ca. 1912)

Colt Model 1911 serial number 12218 - This 1911 was part of a shipment of 500 guns shipped to the Commanding Officer, Rock Island Arsenal, Rock Island, Illinois on November 7, 1912. 

"H" marking on the rear of the slide above the hammer is the provisional inspector's mark of Frank Hosmer.  The die used to create this mark was used to mark the slide, frame and barrel.  This "H" is a serifed version.  The slide is from the serial number range 5800 - 6500.

"H" marking above the disconnector hole is the provisional inspector's mark of Frank Hosmer.  This "H" is a non-serifed version.

Colt logo in a circle on the left side of the slide behind serrations until January 1913, until approximately serial number 20000.

The mark of Army Inspector of Ordnance Major Walter G. Penfield.  Penfield inspected these pistols from January 2, 1911 - September 30, 1914.  Serial numbers of Model 1911 pistols inspected 1 - 101500. (notice the slight ghost stamp to the right of the stamp)

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