A few hundred to multiple thousands depending on EXACT configuration, condition, box, papers, history, etc..
100-400 USD
A Colt peacemaker with that serial number was made in 1974.
if a single action then made about 1900. value depends on overall condition...........
It would depend on the serial number, if all the parts are original, if it is in bad condition and if it has ever been restored. If you repost the question with the serial number of the gun, if it is beat up or not and if it was restored I will give you a good estimate.
1971
about 1973
About 1974.
1974
@ 1973
Made in 75. Rough estimate 250-350
1971
1915