This is a scarce example of a WWI era U.S. Government Model 1911 pistol frame that has been stamped with an "X" prefix replacement serial number. These replacement serial numbers were marked on various frames when they were being rebuilt due to the original serial number becoming unreadable or it was a new replacement frame that was being used and numbered to reassemble a complete pistol. This serial number falls into the block of numbers assigned to Springfield Armory from 1925-1953. This frame has the original "UNITED STATES PROPERTY" markings and the circular "W.G.P." inspector stamp of Walther G. Penfield the US Ordnance inspector from 1911-1914. Based on those two points, it's assumed that this number was restamped due to it being unreadable. The slide is a late WWII blued Model 1911A1 version, with a WWII blued Colt marked barrel. The left side of the slide is marked with the two-line two-block Colt address and patent markings with the Rampant Colt in the middle with "M1911A1 U.S. ARMY" on the right. It has a mix of WWI and WWII parts with a set of walnut grips.

Very good as arsenal refurbished with half of the arsenal black dip finish remaining with wear and thinning on the grip straps/mainspring housing. The Model 1911A1 blued slide retains 97% original blue. The grips are in fair condition and show even wear across the tops of all the checkering. The right side of the frame, directly behind the trigger has been altered/dished out to a Model 1911A1 style but not the left side. A very unusual example of a WWI era Colt Model 1911 pistol with a replacement "X" prefix serial number.