There were no serial numbers stamped on the original Winchester Mdl. 37, single shot shotgun.
The model 12 Winchester pump shotgun with serial numbers from 626,997 to 651,255 where made in 1931, which your guns serial numbers fall in.
Your winchester model 12 shotgun was produced by winchester in 1947.
I can say that Winchester made the model 1400 shotgun from 1964-1981.But they did not record the serial numbers by year of production.
I do not believe that the serial numbers for the Winchester model 140 ranger,semi-auto shotgun are in the public domain.I can say that the Winchester model 1400 was made from 1964-1981,and this was the higher priced version of the model 140 ranger shotgun.
Winchester did not keep records of the model 370 shotguns serial numbers by year of production.I can say that the model 370 Winchester was made from 1968-1973.I hope this helps.
Your winchester model 12 shotgun was made by winchester in 1947.
your Winchester model 1897 shotgun was made in 1916.
your Winchester model 1897 shotgun was made in 1910.
your Winchester model 1897 shotgun was made in 1914 with the serial number that you provided.
Your serial number indicates that your Winchester model 1897 shotgun was made in the year 1903.
Imposable to answer without you providing a serial number to your Winchester model 12 shotgun.