What is this stamp on the knox form of a Long Lee commercial?

[Surpmil]

Maybe john and luke tippins??

http://www.rifleman.org.uk/Tippins-Luke_and_John.htm

Looks like "LRT" to me.

Interesting that Sgt. J. R. Tippins, the son of Luke Tippins, was K.I.A. serving in a machine gun section. You'd think a marksman of that ability would have been useful as a sniper or instructor. And yes, I know the Army likes to make chefs into clerks and clerks into cooks!