Impossible to answer without name of maker and serial number. Possible that records don't exist.
date a gun
WW1
Impossible to date a gun with just by the serial number alone.
For Colt, go to proofhouse.com
Some are published in books.
1800s
Go to the Browning link below and date the gun by serial number.
1136
Impossible to date a gun with just the serial number and no other informaiton.
no. the gun was probably chromed at a later date................
More information is needed. What is the type, model, and specifics of the gun. Your number alone can't identify until we know what type of gun it is
Gun shop, old gun catalogs, blue book of gun values.