Norton model identification with engine and frame numbers

A simple guide to identifying the year of manufacture of a Norton from the engine and frame numbers. "From 1945 to 1974 these numbers 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 to over 300000 over the years.
Sources:

  1. "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].
  2. Norton Owner's Club

 

Post war models

Model Codes

Code
Model
1
Big4
2
16H
3
18
3T
500T
4
ES2
6
19R
7
Big 4
8
16H or Big 4 plunger
9
19S (600cc)
10
International 40
10M
Manx 40
10M2
Manx 40 featherbed
11
International 30
11M
Manx 30
11M2
Manx 30 featherbed
12
Model 7 (497cc)
122
88 (497cc)
13
Rigid Twin & 50
14
99 (596cc)
15
77 (596cc) & Nomad (497cc)
16
Nomad (596cc)
17
Jubilee
18
all 650 twins
19
Navigator
20
Atlas (745cc)
20M3
Commando (distributor)
29M3S (750cc)
Commando (camshaft points
50
AMC 50
ES
Electra (383cc)
ES2
AMC ES2

 

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   ?                  
Note: Earliest surviving factory records are for 23 November 1922 when #4200 was produced.

Model numbers for 1920s

Source: http://www.realclassic.co.uk/

Code

Model

1 Big 4 633cc, 3 speed Sturmey Archer gearbox 
2 490cc, 3 speed Sturmey Archer gearbox 
3 Big 4, 633cc, 3 speed Sturmey Archer gearbox, secondary belt drive 
4 490cc, 3 speed Sturmey Archer gearbox, secondary belt drive 
5 Big 4, 633cc, 3 speed hub, secondary belt drive 
6 490cc, 3 speed hub, secondary belt drive 
7 Brooklands Special (B.S.), 490cc, direct drive with Phillipson pulley (optional) 
8 Brookland Road Special (B.R.S.), 490cc, direct drive with Phillipson pulley (optional) 
9 Tourist Trophy (T.T.), 490cc, direct drive or Phillipson pulley (optional) 
10 Touring machine, direct belt drive 
11 Big 4 633cc, direct belt drive touring machine 
12 490cc, colonial model, 3 speed hub, belt drive 
13 Big 4 633cc, colonial model, 3 speed hub, belt drive 
14 Big 4 633cc, 4 speed, all chain drive 
15 Big 4 633cc, 3 speed, De Luxe sidecar outfit 
16H 490cc, 3 speed, chain drive, touring model 
17 490cc, 3 speed, chain drive, touring colonial model 
18 OHV 490cc, 3 speed, chain drive
19 OHV 588cc, 3 speed, chain drive
20 490cc, twin port exhausts, 3 speed
21 OHV 490cc, dry sump, 3 speed
24 OHV 588cc, 4 speed
25 OHV TT replica, dry sump, 3 speed
24 OHV 490cc,4 speed
44 OHV 588cc,4 speed

Sources: "Flat Tank Norton", George Cohen, 2006:ISBN 978-0-9553743-0-2 (www.norton.uk.com)
Big 4 article at http://www.realclassic.co.uk/norton04030400.html
Various Norton sales brochures

How to pick the Year's Models

Post 1926 Best & Lloyd oil pump
1926 Eng. No. 13279 / 28146
1927 Flat tank, valve adjusters on tappets. Eng. No. 28141 / 35775
1928 Flat tank, valve adjusters on the overhead rockers. Eng. No. 35511 / 40515
1929 Long saddle tank. Eng. No. 41692 / 45599
1930 Enclosed push-rods and rockers. Eng. No. 45600 / 49000
1931 New design short saddle tank. Eng. No. 49001 / 51800
1932 Detachable wheels with bolts exposed, hand adjustable front fork shock absorber. Eng. No. 51801 / 54120
1933 Detachable wheels with bolts enclosed in hub shell. Eng. No. 54121 / 56400
1934 Rebound spring on front forks. Eng. No. 56401 / 59500
1935 Rubber-mounted handlebars. Eng. No. 59501 / 62800
1936 Shorter and thicker push-rod tubes and rounded timing case cover. Eng. No. 62801 / 69999
  Model 18: Push-rod engine; Diamond frame; bore and stroke, 79 x 100.
  Model 19: Push-rod engine; Diamond frame; bore and stroke, 82 x 113.
  Model ES2: Push-rod engine; cradle frame; bore and stroke, 79 x 100.
1937 Eng. No. 70000 / 79999
1938 Model 18: Eng. No. 81575 / 87705
  Model 19: Eng. No. 82119 / 87726
  Model ES2: Eng. No. 81557 / 87757

Updated: 2019-02-05

Source: Motorcycle Identification Manual (with Australian Values) Models 1927 - 1938
Additional information from sales brochures and manuals