That is an old dealers trick to add something to the stock to make it seem like it was from one branch of the service. All fake.
What was the guys name in Texas that made so many USMC M1Rifles?
Back in the 1980's there was a guy named Warren Dorrill, a retired Marine from Oklahoma, who specialized in fake USMC weapons. He had a set of beautiful stamps and usually placed a complete bogus history on the wood, stuff like a fake NM M1icon with USMC SHOOTING TEAM on it, a M97 shotgun with FLEET MARINE POLICE HILO HAWAII, etc., etc. They are so outrageously fake that Texas collectors have coined the term WARDOR for them. They continue to surface like zombies as those who got hooked try to pass them on to unsuspecting rookies. Warren Dorrill has since passed away but his creations continue to surface from time to time.
Bill Hollinger
"We're surrounded, that simplifies our problem!"
Warren Dorrills' Son disputed that claim.
A link..
See bottom of page 2..
Winchester/Underwood Model 1944 (USMC) model