All Marlins (except lever action) manufactured from 1962-1968 A two letter code was used to designate month and year of manufacture.All Marlins manufactured from 1969 to 1990: The first two digits of the serial number designate the year of manufacture, either as the last two digits of the year (in 1969-71) or as a number code (1971 and later)..
Marlin firearms dating
Enter ONLY the LETTER CODE or the FIRST TWO digits of the serial number below.
In order to find the year of manufacture one needs to know the **first two character’s** of the serial number as a minimum, either letters, numbers, or a letter number combination.
Many of these had letter “codes” on them that will help ID date of manufacture. model 336’s, and all other models of centerfire lever action rifles produced by Marlin, as well as lever action rimfire rifles (39, 39A, etc) made by them will have serial numbers. Some of which do not line up with this serial number - date of manufacture convention.
One such example is at least some of the OTASCO (Oklahoma Tire and Supply Co) rifles manufactured by Marlin.
In addition to the first two characters of the serial number, it’s also imperative in many cases to know the model number.
The serial number, depending on the model of rifle, will either be located on the upper or lower stock tang, bottom of the receiver, or side of the receiver.
While these rifles are in essence model 336’s, rebranded under the OTASCO name.
Their serial numbering convention was different from what is shown above.
This was done in conjunction with the sale of Marlin, and subsequent move to the Remington Arms plant in Ilion, NY.
Speculation is that once receivers started being manufactured at the Ilion, NY, plant the prefix became MR.
Below are the manufacturing date codes, EXAMPLES: If your rifle has the single letter “V” serial number prefix, that indicates a 1962 year of manufacture. (Notice there are no “I”, “O”, or “Q” serial number prefixes in use.