Impossible to answer without a detailed description of all features, condition, finish, box, papers, accessories, etc..
what is the manufacturing date fo a colt diamondback serial number O72239
what is the manufacturing date of a marlin rifle model 1893 with the serial number D1624?
No way to answer without the serial number.
1977
1954
1942
1980
1995
1956
Your Marlin firearm was made in the year 1979,with the serial number that you have provided.
Serial number, features
1940