Take the first two digits of your serial number, in your case 20 and subtract that from 100. Your gun was made in 1980. Skeeter
Your marlin model 1893 was made by marlin firearms in 1894.
Your serial number indicates that your Marlin model 336 rifle was made in the year 1971.
Your marlin model 39A was made by the marlin firearms company in 1952.
d15025.You have a Marlin model 36 3rd Variation which was made between 1946-1947.
The serial number plus the book on Marlin Firearms History by Brophy.
Your marlin model 336RC(regular carbine) was made by marlin firearms company in 1968.
go to: Marlinfirearms.com and pose the question to them
Early firearms in .22 caliber were not required to have a serial number. Your Marlin 81 falls into this time frame.
Marlin Firearms is still in business. Check with them.(marlinfirearms.com)
The Marlin model 24 pump action shotgun was produced by Marlin firearms company from 1908-1915.
To determine the age of a Marlin Model 1894 with serial number 19174513, you can refer to the Marlin Firearms Company’s serial number lookup charts. Typically, Marlin Model 1894 rifles produced in the early 1970s and later have serial numbers beginning with 19000000. Therefore, your rifle was likely manufactured around that time, making it approximately 50 years old. For an exact year, you may want to consult specific Marlin production records or a firearms expert.
The H prefix to the serial number that you provided indicates that your marlin model 336 in 30-30 Win. was made by the marlin firearms company in 1951.