A lot of debate has gone around on the internet about what the 'NM' serial number prefix stands for. Some believe that it stands for 'National Match', which is typically the case when you see that marking, however it's not so with Springfield 1911's. It is well known that Springfield Armory Inc. 1911's start from IMBEL forgings from Brazil. Welcome to M1911.ORG. Just Call springfield with the serial number they can give you any information that you wish to know 27th January 2010, 06:59 #8.
- Colt 1911 Value Serial Number
- Springfield 1911 Serial Number Year
- Springfield Armory Nm Serial Numbers
Colt 1911 Value Serial Number
Based on serial number your 1911 was made by Colt in 1919. You probably have a Springfield slide on your 1911 causing you to think it's a Springfield. Not unusual for 45's to have the wrong slide.
The Colt pistol was formally adopted by the Army on March 29, 1911, thus gaining its designation, M1911 (Model of 1911). It was adopted by the Navy and Marine Corps in 1913. Originally manufactured only by Colt, demand for the firearm in World War I saw the expansion of manufacture to the government-owned Springfield Armory.
Springfield 1911 Serial Number Year
Springfield Armory Nm Serial Numbers
Battlefield experience in the First World War led to some more small external changes, completed in 1924. The new version received a modified type classification, M1911A1. Changes to the original design were minor and consisted of a shorter trigger, cutouts in the frame behind the trigger, an arched mainspring housing, a longer grip safety spur (to prevent hammer bite), a wider front sight, a shorter spur on the hammer, and simplified grip checkering by eliminating the 'Double Diamond' reliefs.
Those unfamiliar with the design are often unable to tell the difference between the two versions at a glance. No significant internal changes were made, and parts remained interchangeable between the two.