Find books on the maker.
Find a book with sn's from that maker.
You will have to call Browning to find out.
Find a book of sn's that has been published on the weapon.
Check the serial number against published references or call the company that made it.
You will need to call Browinng with the serial number or find a copy of the Blue Book of Gun Values.
By the serial #
It depends on what you mean. If you mean that you want to find the age of the gun based on the serial number, there are a few online sources, such as the Blue Book of Gun Values. If you mean that you want to find out if it is registered, no.
You must call Browning with the serial number to find out.
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.