Make: Marlin Model: 99 M1 Serial Number: NSN Year of Manufacture: 1967 (DK date code) Caliber:.22 Long Rifle Action Type: Semi-Automatic, Tube Magazine Fed Rifle Markings: The left side of the barrel is marked 'THE MARLIN FIREARMS CO.' , 'MODEL 99M1-CAL. 22L.R./ NEW HAVEN, CONN., U.S.A.' and 'DK'. The butt plate is marked 'Marlin'.
- Marlin Model 336 and Models 39-A and 39-M manufactured from 1948 to 1968: A one or two letter code was used to designate the year of manufacture. All Marlins (except lever action) manufactured from 1962-1968.
- Marlin Model 99 M1 - Model 60's daddy. 22 LR I've shot it a few times with no hick-ups and fairly accurate with Federal bulk. Correct rear sight (haven't seen one for sale in months, worth $50-$75 alone). Pre-serial number production - someone etched SN on it - must be 1968. Stock has initials burned in. Bore sharp and shiny.
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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:
1946-C
1947-D
1948-E
1949-F
1950-G
1951-H
1952-J
1953-K
1954-L
1955-M
1956-N
![Marlin Marlin](http://oldguns.net/pix/smf863.jpg)
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
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
![Serial Serial](https://decg5lu73tfmh.cloudfront.net/gunvaluesboard.com/images/fbfiles/images/Marlin-99-M1-numbers-on-side-plate-fvear4oftr_v_1500551749.jpg)
1970-70
1971-71
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:
A = Jan.
B = Feb.
Marlin Model 99m1 Serial Number Lookup
C = Mar.
D = Apr.
E = May
F = June
G = July
H = Aug.
I = Sep.
![Marlin model 99 m1 serial number Marlin model 99 m1 serial number](https://img.over-blog-kiwi.com/3/14/96/52/20190117/ob_f7e53b_6.gif)
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
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
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:
A = Jan.
B = Feb.
C = Mar.
D = Apr.
E = May
F = June
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
So a date code of 'JK' would indicate that rifle was made in October of 1967.
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
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:
A = Jan.
B = Feb.
Marlin Model 99m1 Serial Number Lookup
C = Mar.
D = Apr.
E = May
F = June
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
Marlin Model 99 M1 Serial Numbers
L = 1968So a date code of 'JK' would indicate that rifle was made in October of 1967.