This Colt M1911 was originally blued when it left the factory in 1914. Over the years nearly every part has been changed out and the pistol has been refinished. It's unknown weather this was done through the military or in the civilian market.
It's wearing a WWII vintage replacement slide marked "M1911 A1 U.S. ARMY". These slides begin production in 1938 and ran until 1943. Colt, Ithaca, Remington Rand and Union Switch & Signal produced replacement slides.
The original grips or stocks would have been made from checkered walnut with double diamonds around the grip screws. They have been swapped out at some point with the left side wearing a Keyes Fiber Co panel. The Right side is a Coltwood plastic stock.
The mainspring housing, trigger, grip safety and thumb safety have been changed out to mimic the M1911A1 configuration.