The Colt Gold Cup NM .45 with serial number 15051 NM was made in 1965
1983
1974
It was made in 1976.
approximately 1974
1962
was made in 1971
Your serial number indicates that your marlin rifle was made in the year 1992.
A little after 1976
Need the serial number.
The 2 letters located in your serial number(NV) indicate that your Browning gold 12 gauge shotgun was made in the year 1995.
made about 1969..........................