You can't
about 1962 In 1957 colt re-introduced the National Match model with serial numbers from 26-NM to 37025-NM
National Match serial numbers have NM, MR or 70N as part of the serial number. If the serial number is 32597NM; 1969. If not, possibly a NM slide was placed on a 1913 frame.
Colt National Match .45 with that serial number was made around the end of 1960.
Your Colt 1911 national match was made in 1963.
It was made in 1963.
Made in 1968.
made about 1967
Made in 1961.
Mfg 1925. Serial numbers are stamed on the barrel flats, on the water table (receiver) and on the forend. They should all match.
not sure of exact date but probably after 1956 in 1957 colt re-introduced the National Mach model with serial numbers 26-NM to 37025-NM
The Colt match target .22 with serial number 220044-S was made in 1966.
made about 1967.........................