Check the top of the receiver and under the forearm.
No published sn data that I know of.
1970's-1980's probably.
I would need to know the model number to your shotgun,along with the type which would be single shot,or a double barrel,along with the overall condition of your shotgun.The number provided by you is the serial number.
Check the frame and barrel
CHeck the barrel and receiver.
No way to value with just the serial number.
The serial number on a Marlin Model 120 shotgun is typically located on the underside of the receiver, just in front of the trigger guard. In some cases, it may also be found on the barrel, near the receiver. It's best to check both areas for the serial number.
SN not required before 1968
On the bottom side near the triger
What year is a Parker Shotgun Serial number 126212
The serial number to a browning shotgun made in the year 1989 will have the letters PN found some where in the serial number.
I have an older amadeo coach shotgun by rossi, it is nickel plated. Can you tell me if that is the way it came. Is it a shooter or wall hanger?