I can't tell you the value, but assuming it is not the Feather Weight Model 1912 with the suffix 'F' after the serial number, your gun was manufactured in 1939. You will need to talk to a gun dealer about its value, or try the Ask The Experts forum at Gun Brokers.com at (http://www.gunsonthenet.com/). This is one of the most common configurations of the Winchester Model 12. Values range from as low as $200 for a very used condition up through $1000 for a mint-with-box example. sales@countrygunsmith.net
Receiver/barrel
Check the receiver and barrel
On the barrel.
barrel, tang, receiver
Check the receiver and barrel area.
Check the receiver and barrel.
Check the receiver and barrel
Check the receiver, barrel
Check the receiver and barrel
Please include the model number of your Winchester shotgun to get a correct answer to your question along with the serial number.
on the bottom of the barrel and reciever.
Barrel and receiver are the most common place.