Find a book of sn's that has been published on the weapon.
The model number of the gun and make along with the serial number usually will determine the age of a gun.
Where did you get that gun?
Serial number tables, if published
By the serial number.
You are going to have to identify the model number to determine the age. Take the gun to a gun shop or gun smith for assistance.
The letter of the given serial number indicates the year the gun was manufactured. In this case, the gun was made in 1960.
1977
Find books on the maker.
You will have to call Browning to find out.
The gun were made in 1906.
4092
Call Browning, give them the serial number, and they will tell you the age and a host of other information about your gun.