I hope this helps all Marlin owners:

• Marlin 336w Serial Number Date Of Manufacture
• Marlin Model 92 Serial Numbers
• Marlin Serial Number Date Of Manufacture
• Marlin 336 Dates Of Manufacture

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Marlin Year of Manufacture
Marlin year of manufacture maybe determined from the following list of letter/numeral prefixs to the serial number; this coding only applies to serialized rifles:

Marlin 336w Serial Number Date Of Manufacture

Pick a model from the left hand menu. 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. Below are the manufacturing date codes, which are the first one or two characters of the serial number. Please note this list is NOT INCLUSIVE of all Marlin firearms. How to find the date that your Marlin rifle was manufactured based off of the serial number.http://www.marlinowners.com/forum/marlin-collectors/97319-finally.

1946-C
1947-D
1948-E
1949-F
1950-G
1951-H
1952-J
1953-K
1954-L
1955-M
1956-N
1957-P
1958-R
1959-S
1960 (August)-1961-U
1961 (August)-1962-V
1963-W
1964-Y,-Z
1965-AA
1966-AB
1967-AC
1968-AD, -68
1969-69
1970-70
1971-71

Marlin Model 92 Serial Numbers

1972-72
Starting in 1973, the year of manufacture maybe determined by subtracting the first two digits of the serial number from 100:
Example: SN 2512345 would have been made in 1975 [100 - 25 = 75] and SN 94365295 would have been made in 2006 [ 100 - 94 = 06 (2006) ].
For Marlin Rimfire Rifles [non-serialized]:
From 1962 thru 1968 Marlins rimfire rifles (other than the 39 series lever actions) used a two letter date code that was stamped on the barrel. This date code is different than the one already listed, as Marlin rimfire rifles (other than the model 39 series) did not have a serial numbers until required to by Law after 1968. The first letter of the date code represented the month of manufacture while the second letter indicated the year. This date code was usually stamped on the left side of the barrel just in front of the receiver. The first letter of the date code is as follows:

Marlin Serial Number Date Of Manufacture

A = Jan.
B = Feb.
C = Mar.
D = Apr.
E = May
F = June

Marlin 336 Dates Of Manufacture

G = July
H = Aug.
I = Sep.
J = Oct.
K = Nov.
L = Dec.
The second letter of the date code is as follows:
F = 1962
G = 1963
H = 1964
I = 1965
J = 1966
K = 1967
L = 1968
So a date code of 'JK' would indicate that rifle was made in October of 1967.