about 1977..................
Your gold cup NM was produced in 1976.
Colt gold cup national match .45 with that serial number was produced in the first year of production, 1957.
With the serial number,818NM, it would have been the 1st year of production,1957
Glocktalk has a serial number sticky
Your Colt gold cup national match .45 was made in 1966 per proofhouse.com. The production for that year started off with serial number 16600-NM.
Proofhouse.com shows 7000NMR starting in 1971.
Your serial number indicates that your Browning 16 gauge shotgun was made in the first year of production,which was 1909.
With that serial number, you will have to call Colt.
Your serial number places the year of production as 1978.
What is the production year of a colt combat commander with serial number 70sc5572? Early 1972.
The Colt commander with that serial number was made in 1955.
The serial number allows the maker to track production.