With the serial number that you provided,your Winchester model 12 pump action shotgun was produced in the year 1955.
Your winchester model 12 shotgun was made by winchester in 1956.
Your Winchester model 12 was made in the year 1923.
Your model 12 Winchester shotgun was made by Winchester in 1926.
your Winchester model 12 was made in 1913.
Your model 12 Winchester shotgun was made in the year 1950.
Your Winchester model 12 shotgun was produced by Winchester in 1936.
Your winchester model 12 shotgun was made by winchester in 1937.
your Winchester model 12 shotgun was made in 1948.
your Winchester model 12 was made in 1941.
your Winchester model 12 was made in 1941.
your Winchester model 12 shotgun was produced in 1950.
your Winchester model 12 was made in 1938.