Norton engine and frame numbers
A simple guide to identifying the year of manufacture of a Norton from its engine and
frame numbers.
"From 1945 to 1974 these should match , and up to 1960 should include a year letter code. There
will also be a number code for the model and the serial number
which ran from 10001 too over 300 000 over the years." Illustrated Norton Buyer's Guide, Bacon,
Roy H. (Roy Hunt), Niton Publishing. PO Box 3, Ventnor, Isle of Wight PO 38 2As England, 1991. [Out
of print in Australia 1999]. Norton Owner's Club NOC
| Code |
Model |
Code |
Model |
Code |
Model |
| 2 |
16H |
10M2 |
Manx 40 featherbed |
17 |
Jubilee |
| 3 |
18 |
11 |
International 30 |
18 |
all 650 twins |
| 3T |
500T |
11M |
Manx 30 |
19 |
Navigator |
| 4 |
ES2 |
11M2 |
Manx 30 featherbed |
20 |
Atlas |
| 6 |
19R |
12 |
Model 7 |
20M3 |
Commando (distributor) |
| 7 |
Big 4 |
122 |
88 |
29M3S |
Commando (camshaft
points |
| 8 |
16H or Big 4 plunger |
13 |
50 |
50 |
AMC 50 |
| 9 |
19S |
14 |
99 |
ES |
Electra |
| 10 |
International 40 |
15 |
77
& Nomad |
ES2 |
AMC
ES2 |
| 10M |
Manx 40 |
16 |
Nomad |
|
|
Suffix
D indicates de luxe twin
Suffix SS indicates Sports Special twin
Suffix Q indicates quietening ramp cams ( some 1947 singles) |
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| Norton engine & frame
numbers |
Pre-war
numbers |
|
Post-war
with serial numbers |
|
Post-war
numbers continued |
| YEAR |
Number |
NOC
Number |
|
YEAR |
Code
Letter |
NUMBER |
NOC
Number |
|
YEAR |
NUMBER |
NOC
Number |
1923 |
|
4200 |
|
1945 |
|
1001 |
|
|
1961 |
94500 |
99270 |
| 1924 |
|
7500 |
|
1946 |
A |
2131 |
1001 |
|
1962 |
101060 |
99498 |
| 1925 |
|
11900 |
|
1947 |
B |
7756 |
6550 |
|
1963 |
105000 |
104000 |
| 1926 |
|
27500 |
|
1948 |
C |
13792 |
13350 |
|
1964 |
108000 |
108000 |
| 1927 |
|
32800 |
|
1949 |
D |
20701 |
18600 |
|
1965 |
111650 |
111650 |
| 1928 |
|
36900 |
|
1950 |
E |
27100 |
25000 |
|
1966 |
115870 |
115900 |
| 1929 |
|
41000 |
|
1951 |
F |
35560 |
33943 |
|
1967 |
119760 |
120130 |
| 1930 |
|
45600 |
|
1952 |
G |
42700 |
40320 |
|
1968 |
124300 |
124370 |
| 1931 |
|
49250 |
|
1953 |
H |
48900 |
47300 |
|
1969 |
130000 |
129500 |
| 1932 |
|
51820 |
|
1954 |
J |
55350 |
52800 |
|
1970 |
134700 |
134400 |
| 1933 |
|
54120 |
|
1955 |
K |
60700 |
59200 |
|
1971 |
141700 |
141000
to 150500 |
| 1934 |
|
56410 |
|
1956 |
L |
66600 |
64561 |
|
1972 |
200001 |
200001
to 216000 |
| 1935 |
|
59500 |
|
1957 |
M |
71360 |
70095 |
|
1973 Jun |
|
230558
(750) |
| 1936 |
|
62800 |
|
1958 |
N |
77400 |
75051 |
|
1973
Sep |
212278 |
230571
(750) |
| 1937 |
|
69800 |
|
1959 |
P |
80488 |
79301 |
|
last 750 |
|
230935 |
| 1938 |
|
81500 |
|
1960 |
R |
87038 |
84500 |
|
1973
Mar |
|
325000
(850) |
| 1939 |
|
87920 |
|
|
|
|
|
|
1973 Dec |
300000 (850) |
310360 (850) |
| 1940 |
|
? |
|
|
|
|
|
|
1974 Jun |
|
316600 (850) |
| 1941 |
|
? |
|
|
|
|
|
|
1974 Dec |
307311 |
326000 (850) |
| 1942 |
|
? |
|
|
|
|
|
|
1975 Jun |
325000 (MkIII) 125001 (frame) |
333000 (850) |
| 1943 |
|
? |
|
|
|
|
|
|
|
|
|
| 1944 |
|
? |
|
|
|
|
|
|
|
|
|
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updated: 25 April 2008
