TheM1Garand.com

S. A. / J.L.G. (Springfield Armory / James L. Guidon).

Version 1 Early Hand Stamp Cartouche

• Found on 1950's early rebuilds. 

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Version 2 

S/N 4,200,000-4,350,000 July 1950- September 1953

• Circled 'P' proof mark with serifs on the pistol grip 

• Observed With and without Ordnance Wheel with Crossed Cannons .437" in diameter. 

• Flat/Straight Cut Clip Latch Cut Out

• Ordnance Wheel with Crossed Cannons. The wheel was .437" in diameter.

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Information from Scott Duff:

After Col. Guion took command of SA in July 1950, overhauled M1 rifles "were (hand) stamped "SA/JLG" on the stocks left side. A similar final inspection stamp was also used on newly made M1s when the production line reopened in the early 1950's. When the new M1 production began, use of the "SA/JLG" rebuild stamp ceased and was replaced by a rebuild stamp consisting of ""SA" often enclosed in a three or four cornered box. Many of these stamps also had a one or two letter code to identify the inspector who supervised the procedure. This "SA" rebuild stamp was most commonly applied to the left side of the butt."

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Source:https://www.americanrifleman.org/articles/2015/12/10/from-the-american-rifleman-archives-in-the-system-m1-garand-rebuilds/