Date Serial Start Serial End
Manufacturer
Quantity:
1924 700001 710000 Colt 10,000
1937 710001 711605 Colt (USN 836, USA 769) 1,605
1937 711606 712349 Colt (USN) 744
1938 712350 713645 Colt 1296
1939 713646 717281 Colt USN 3,636
1940 717282 721977 Colt 4,696
1941 721978 756733 Colt 34,756
1942 756734 793657 Colt 36,924
1942 793658 797639 Colt USN 3982
1942 797640 800000 Colt 2,361
1941 S800001 S800500 Singer Mfg. Co. 500
1941 H800501 H80100 (Assigned to H&R)
1942 801001 856100 Colt 55,100
1942-43 856101 958100 Colt (1943: ±862000-958100) 102,000
856101 856404 (Replacement numbers) 304
1943 *856405 916404 Ithaca 60,000
1942-43 *916405 1041404 Rem. Rand (1943: ±921700-1041404) 125,000
1943 *1041405 1096404 Union Switch & Signal 55,000
1943 1088726 1092896 Colt 4,171
1943-44 1096405 1208673 Colt (1944: ±1155000-1208673) 112,269
1943-44 1208674 1279673 Ithaca (1944: ±1235000-1279673) 71,000
1279674 1279698 (Replacement numbers) 25
1943-44 1279699 1441430 Rand (1944: ±1363700-1441430) 161,732
1944 1441431 1471430 Ithaca 30,000
1944 1471431 1609528 Remington Rand 138,098
1944-45 1609529 1743846 Colt (1945: ±1720000-1743846) 134,318
1944 1743847 1816641 Remington. Rand 72,795
1944-45 1816642 1890503 Ithaca (1945:1816642-1845997) 73,862
1944-45 1890504 2075103 Rem. Rand (1945: ±2031600-2075103) 184,600
1944-45 2075104 2134403 Ithaca (1945: 2110465-2134403) 59,300
1945 2134404 2244803 Remington Rand 110,400
1945 2244804 2380013 Colt approximately 119,450
1945 -2368781 Last pistol manufactured by Colt
1945 2380014 2619013 Remington Rand 85,126
1945 -2465139 Last pistol manufactured by Remington Rand
1945 2619014 2693613 Ithaca 41,305
1945 -2660318 Last pistol manufactured by Ithaca
*  Colt duplicated the following serial numbers:
(856405- 916404) 60,000 pistols in the Ithaca serial range
(916405- 958100) 41,696 pistols in the Remington Rand serial range
(1088726-1092896) 4,171 pistols in the US&S serial range
± Indicates the approximate serial number at the beginning of the year, as those pistols were not manufactured or shipped in numerical order.
NOTE: Colt and Ithaca serial numbers based on shipping records. All other pistols based on procurement records.

Charles W. Clawson. Collector's Guide to Colt .45 Service Pistols: Models of 1911 and 1911A1 Third Edition. Fort Wayne, IN 46885-5216