No one method, and not always possible. It uses factory production records, or a system that varies from one maker to another.
Impossible to date a gun with just the serial number and no other informaiton.
Impossible to date a gun with just by the serial number alone.
Usually by the serial number. If no serial number, then by features
1136
For Colt, go to proofhouse.com
Yes.
Go to the Browning link below and date the gun by serial number.
No serial number provided; no way to answer.
1910
According to the serial number, you have a Crass model gun. The manufacture date is around 1898. Check out www.ithacagunrepair.com.
Blue Book of Gun Values will tell you.
This gun was made in 1976