Forget the serial, check the date code stamped on the barrel. See related links.
400 dollars
the age of a model 12 shotgun can be determined by the serial number.
your model 12 Winchester shotgun was made in 1937.so the age of your shotgun is 73 yrs.old.
Your serial number indicates that your Winchester model 12 shotgun was made in the year 1946.
Your Winchester shotgun was manufactured in 1914.
1956 This shotgun WA manufactured in 1956
1935
1921
1957
1942
1926
list the serial number and we can help