Small parts are blue or sandblasted blued. Ithaca 856,405 to about 900,000: Du-Lite bluing over a sand blasted surface. Pistols in this range are observed to have a mixed assortment of blued and parkerized small parts.Ĭolt 780,000 to end of war production: All pistols and small parts are parkerized. Parkerizing adopted as the standard finish. small parts have a blued finish that closely match the slide and frame.Ĭolt 729,993 to780,000: First parkerized pistol. Among those was the elimination of the fine polishing step.Ĭolt Post WWI to 1941: Colt brushed blue finish, Coarser girt size on close inspection. This was due to changes implemented to speed production and reduce cost. These pistols are referred to as the "Black Colt" or "Black Armys". small parts have a blued finish that appears to match the slide and frame on near new pistols.Ĭolt serial #400,000 to end of WWI: Very coarse blued finish causes pistols to almost appear black. Small parts have a smoky blue finish that appears lighter than the color of the slide and receiver.Ĭolt serial #160,000 to about serial #400,000: Colt brushed blue finish, Coarser girt size on close inspection. These pistols might have been held back to perform some remedial rework and by the time the rework was completed, the acceptable finish had changed to the duller finish and they then got the later finish.Ĭolt serial #2401 to about serial #160,000: Fine brushed looking Finish, furnace blued. "Oil Finish" Yet some seemingly original pistols within the serial range have the later duller finish. Certain small parts have a high polished bright Fire blued (Cobalt Color) appearance. All small parts parkerized.Ĭolt 1 to 2400: Bright furnace blued, Slide and receiver highly polished. Remington Rand 995,000 end of production: Parkerized, also some sand-blasted blued are intermixed during the early production (1,015,000). The entire pistol appears to be flat blue gray in color. Remington Rand 916,405 to 995,000: Du-Lite bluing over a very fine sand blasted surface. As listed below, parkerizing is correct for Remington Rand 1911A1's after 995,000 serial number. Here's some data on correct finishes for 1911's.
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