Post WW1 insection stamp on Model 1903 stock

[RCS]

Any information on this S.P.L. in a rectangle stamp ? Rick borecky one and I was able to find another photo.

I believe it is post WW1

[John Beard]

You are correct that it's a post-WWI Springfield Armory inspection stamp. But the inspector and his exact tenure have not been identified.

J.B.