Serial number "U" is 1961
Date
Prefix(s)
1946
C
1947
D
1948
E
1949
F
1950
G
1951
H
1952
J
1953
K
1954
L
1955
M
Date
Prefix(s)
1956
N
1957
P
1958
R
1959
S
1960
T
1961
U
1962
V
1963
W
1964
Y,
Z
1965
AA
Date
Prefix(s)
1966
AB
1967
AC
1968
AD,
68
1969
69
1970
70
1971
71
1972
72
The following table can be used to date the year of manufacture of a Marlin 336. It is also valid for determining most other Marlin firearm build dates from 1946 to the present.
Marlin year of manufacture maybe determined from the following table of letter/numeral prefixs to the serial number:
SOURCE: i need to know how to take aport a marlin 336
Your best bet is to buy a book that gives you the step by step actions to doing this project. I just recently did the same thing with the same weapon.
Refinished the stock, replaced some parts, etc. The best book Ive found and used on multiple Firearm tear downs and reassemblies is "The Official NRA Guide to Firearms Assembly Two Volume Set". Comes with a book for Handguns/Revolvers and a book for Shotguns/Rifles.
You can get it HERE
And it will run ya about $45 for the set. Hope this helps.
SOURCE: Marlin model 70P, serial #14388170 date of manufacture
1986
Take the 1st two numbers of the serial number, and subtract from 100.
14388170 = 14
100 - 14 = 86 = 1986
Testimonial: "sounds about right considering the condition of the rifle. Thanks"
1964
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