He is shown signing with his right hand in that publication as well as other photos. I know people who shoot pistol with right hand and long gun left handed. Odd to see, but comes in handy during transition drills.
Norm — they did it with the M1903 Springfield, M1917 Enfield, Thompson, M3 Grease Gun, M1 carbine, M1911 pistol, and a variety of revolvers. None of which have the safety in the trigger guard.
John Garand put the safety there because it was assumed that’s where the trigger finger would be at the beginning of a sudden encounter.
The US military didn’t REALLY start emphasizing “trigger finger off and out until actually aiming and squeezing” until a bunch of draftees started shooting themselves in the leg doing Quickdraw McGraw crap (generally squeezing the trigger and simultaneously cocking during the draw for a “super-fast” hip shot), with Peacemakers and Ruger Single Six’s during the Cowboy Craze of about 1955 – 1965.
They even made a half dozen or so training films for the Army and Air Force on “How not to shoot yourself in the thigh with your cowboy gun.” Seriously — we used to watch them (and other 1950-1970 training films) in JROTC when it was too inclement for drill practice. Friggin’ hilarious to watch an actor portraying Pentatomic Private Skippy in his barracks bay, talking like a bad spaghetti western character, suddenly draw and shoot himself in the leg, then try and limp to sick call and pretend “I was just standing there, MMOB (Minding My Own Business), and the gun just magically went off”.
The universal issue of fully automatic weapons as the default issue also contributed to DoD awareness of trigger discipline — an “Oopsie!” with a Springfield is bad enough, but an “Oopsie” with an M14 or M16 set on “Repel Boarders” can take out most of a squad.