Manufactured in 1941, the Robert Sears inspected Colts marked the transition point from Colt's high polish blue to the Parkerization treatment that would become the standard for the rest of the war. Blade and flat top notch sights, with the Rampant Colt bisected address and patents on the matching numbered slide, "R.S." stamped frame with "R/VP" and "39" marked trigger guard, short milled trigger, wide hammer, checkered arched mainspring housing, checkered Colt grips (unribbed, reinforced screw holes), unmarked full blue magazine and a "COLT 45 AUTO" barrel with a small "F" ahead of the lug.