

Usually you can tell who made what frame by following a basic formula. There were no manufacturer's names or logos on the frames, and was just said the slides were often switched around.
#Colt serial number lookup for pistols serial numbers#
The old military pistols only had the serial numbers on the frame, along with the US Property marking, M1911A1 marking, and inspection marks. I honestly don't know what they would want with 65+ year-old pistols that are worth far more to collectors than to cops, but that's the way it is currently. I hear a lot of LE departments have been receiving old USGI pistols from the government. While both Remington Rand and Ithaca both had FJA marked on them, when comparing the "M1911A1 US ARMY" you'll see the Ithaca's font is larger and fatter than the R-R. If by chance you see one marked JKC then it's a rare bird made by Singer.

If the marking is RCD then the frame was made by Union Switch & Signal.

Colts were either CSR, RS, WB, GHD, or JSB (I'm excluding the earlier pre-war frames). If the inspection mark on the left side is "FJA" then the frame is either a Remington Rand or an Ithaca. Click to expand.The old military pistols only had the serial numbers on the frame, along with the US Property marking, M1911A1 marking, and inspection marks.
