They were: S/N U1 to U112.) 1) Colt M1911 Canadian Contract: S/N C5400 to C16599 = Sept.
No arsenal did rebluing, certainly not in or after WW2. 7) Colt M1911 Norwegian: Colt S/N C18501 to C18850 and Norway S/N 1 to 5000 = June 1915 to WW II (400 Colt 1911’s .45 caliber purchased and issued to Norwegian Navy. 45) Union Switch & Signal: S/N 1,041,405 to 1,060,000 = 1943 46) Union Switch & Signal: S/N 1,060,000 to 1,096,404 = 1943 (S/N’s 1,088,726 to 1,092,896 were duplicated by Colt. S.) Regular commercial model Colt except has “English Order” mark in Russian on left side of frame.I recently received an arsenal of WWII handguns from my wife's grandfather and have spent a long time trying to figure out production dates. Would be an AA stamp, or a Rem Rand or Ithaca marking on the slide.I have a Remington Rand that has every indication of being exactly that (diamond count on grips, all barrel, body, etc markings) but the serial number doesn't work. Avoid the temptation to replace everything on your brand-new 1911 just to make it "better". You may spend a lot of money fixing things that weren't broken to begin with. I told her I'd give her 00 for it, which made her laugh... Your SN corresponds to a 1918 made by Colt and should have a black blued look to it.