Colt Model 1911A1 - Blued Colt M1911A1 .45 cal. S/N 718092, the slide is numbered to match, CSR inspectors mark on left side of the frame and on the top of the frame near the disconnector.  Pistol has Coltrock stocks which are not commonly encountered on these pistols as it proved to be too brittle for military use.  Pistol was one of 1,300 pistols shipped to the Commanding Officer, Springfield Armory on April 18, 1940.  This was the first shipment of the 4,696 pistols delivered in 1940.

There is a P proof on the top of the slide, in front of the rear sight and alto a P on the left side of the frame near the magazine release button.

Left side of 718092. 

Original "Coltrock" Stocks, hollow back with no mould markings.

Close-up of serial number and right side frame markings.

The initials of Major Charles S. Reed (C.S.R.), Officer in Charge of Outside Inspection, were stamped on all M1911A1 pistols manufactured in 1940, signifying government acceptance of the pistol.  His initials were stamped on the left side of the receiver below the slide stop in accordance with Ordnance drawings.  The initials C.S.R.  were also stamped on the top of the receiver near the disconnector hole to indicate provisional inspection, replacing the previous letter "R" within an oval.

Underside view showing front grip strap, trigger guard, bottom of frame and slide recoil spring housing.

Base of full blued magazine marked "COLT" over "45 AUTO"

Rear grip safety showing blued finish.