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With the serial number that you provided,your Winchester model 62A was made in the year 1947.
your model 62A was one of the last rifles made in 1957.
Check the sn tables at Proofhouse.com
With out a serial number I cannot give the exact year of production.I can say that the model 62A was made by winchester from 1940-1958.With a total production of 409,000 made.
With the serial number that you have provided,your Winchester model 62A was made in the year 1953.
Your Model 62A was manufactured in 1953 -"Spider"
Winchester Model 62A serial number 374812 was manufactured in February of the year 1956.
1942
Your serial number indicates that your Winchester model 62A was made in the year 1949.
No sn's required before 1968.
1958
No way to answer without the serial number.