Square P and ESSA on M1917 Stock

[c&rfan]

The P in a square is the proof mark of San Antonio Arsenal. The other mark (ESSA) is the San Antonio rebuild mark.

Would it make sense that my carbine has the San Antonio proof mark and the Red River Army Arsenal rebuild mark?

Information

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[Dan Wilson]

The square boxed P was done at both Red River and San Antonio.
HK Guns, does it actually read ESSA or would it be ESAA?

Dan

[HKGuns]

The square boxed P was done at both Red River and San Antonio.
HK Guns, does it actually read ESSA or would it be ESAA?

Dan

Dan Wilson, it reads ESAA thank-you for catching my type-o!

[HKGuns]

Actually, the more I look at a picture, the more it looks like a CSAA on the stock. It is somewhat faint. I suppose I should do a rub on it when it comes back from the gunsmith.

[JGaynor]

Would it make sense that my carbine has the San Antonio proof mark and the Red River Army Arsenal rebuild mark?

Yes it basically indicates the stock was recycled twice and used on two rebuilt carbines.
If a major component such as a barrel or bolt required replacement an additional proof firing may have been performed

Regards,

Jim