Your winchester model 42 shotgun was made by winchester in 1954 with the serial number that you provided.
With the serial number that you provided,your Winchester model 42 shotgun was produced in the year 1953.
Your serial number indicates that your Winchester model 12 shotgun was made in the year 1931.
1919-24
With the serial number that you supplied,your Winchester model 42 shotgun was made in the year 1953.
The Winchester model 20 was a youth .410 single shot gun manufactured between 1918-1924. Only about 24,000 were built. Your serial number is not from a Winchester model 20.
Your Winchester model 20 shotgun was made early enough to have a date listed by serial number.After serial number 11253 Winchester lost the remaining records.Your Winchester model 20 was made in the year 1920.There were a total production of 23,616 shotguns of this model made.
Sn's were not required before 1968
There is no such thing as a Mod. 12 in .410. Perhaps you have a Mod. 42? If so, it was made in 1955.
The gun was made in 1940.
With the serial number that you provided,your Winchester model 42 shotgun was produced in the year 1936.
Please include the model number and overall condition before we can give you a answer to your question.