Made in 1976.
A Colt peacemaker with that serial number was made in 1974.
The closest I can find to that serial number would be a Colt peacemaker model .22 made about 1975.
With a G prefix, it is a Peacemaker and dates to 1972. The New Frontier sn would have NF at the end.
1971
about 1973
About 1974.
1974
@ 1973
1971
1915
Need serial number to answer.
A Colt peacemaker .22 model with that serial number was made in 1971.