You won't. They were made in the 1950s up to 1968 (no serial number indicates pre-1968) The gun is a High Standard Flight King. No very expensive, but a well made durable hunting grade shotgun. Depending on condition, $125-$175
Early 1950's
The J.C. Higgins Model 103.13 is a shotgun that was manufactured by High Standard for Sears, Roebuck and Co. The production of this model began in the late 1950s and continued into the 1960s. Specific manufacture dates can vary, so checking the serial number can provide a more accurate date for a particular firearm.
Which Model?
Not listed.
your Winchester model 12 shotgun was made by Winchester in 1959.
your shotgun was made in 1906
2/14/1948
1913
Impossible to answer without knowing which model.
The Marlin model 24 shotgun was produced by Marlin from 1908-1915.
your Winchester model 12 shotgun was made in 1940.
Your winchester model 12 shotgun was made by winchester in 1953.