To determine the date of manufacture for your Winchester Model 12, you'll need to check the serial number located on the bottom of the receiver. Winchester produced the Model 12 from 1912 to 1964, and the serial number can be cross-referenced with production records to find the specific year of manufacture. You can find resources online or consult a Winchester reference book for accurate dating based on the serial number.
your Winchester model 12 shotgun was made in 1940.
1932
your Winchester model 12 shotgun was made by Winchester in 1959.
1946
your model 12 Winchester shotgun was made in late 1959.
Your winchester model 12 shotgun was made by winchester in 1953.
year 1946
1928 Fred
Go to Proofhouse.com and look at the Winchester sn data.
your model 12 Winchester shotgun was made in 1953.
your model 12 shotgun was made in 1961.
year 1954