1972
1951
it was produced in 1931.
A Colt peacemaker with that serial number was made in 1974.
Impossible to answer without knowing who made it and what condition it is in.
1913, give or take. If it is going to be for sale, we would be interested. www.countrygunsmith.net
Go to the Winchester site. There used to be a link that you could follow that showed ranges of serial numbers and manufacture dates. I don't know about where to go for value. You could go to a gun store and ask for them to give you an approximate value for insurance.
It probably isn't stamped anywhere on the gun. If you know the manufacturer and model, there may be a serial number. If there is a serial, there may be records which will give an approximate date of manufacture.
1959; 100 USD
Impossible to answer without a detailed description of ALL markings, finish, serial number and overall condition.
You will have to provide the name of the maker.
No serial number - no answer.
What is year of manufacture of a Browning Shotgun A-5 with serial number 01553NP111?