Some engine and frame number info for old British Iron!

Technical Info. > Engine & Frame Numbers > Norton : Triumph : BSA

Norton Year Codes	Code	Year	Code	Year	Code	Year
Year codes were used for all models between 1946 & 1960.	A	1946	F	1951	L	1956
	B	1947	G	1952	M	1957
	C	1948	H	1953	N	1958
	D	1949	J	1954	P	1959
	E	1950	K	1955	R	1960

Norton Model Codes	Code	Model	Code	Model
In addition; suffix D indicates de-luxe twin, suffix SS indicates Sports Special twin, suffix Q indicates quietening ramp cams (some 1947 singles)	2	16H	122	88
	3	18	13	50
	3T	500T	14	99
	4	ES2	15	77 & Nomad
	6	19R	16	Nomad
	7	Big 4	17	Jubilee
	8	16H or Big Four plunger	18	All 650 twins
	9	19S	19	Navigator
	10	International 40	20	Atlas
	10M	Manx 40	20M3	Commando (distributor)
	10M2	Manx 40 Featherbed	20M3S	Commando (camshaft points)
	11	International 30	50	AMC 50
	11M	Manx 30	ES	Electra
	11M2	Manx 30 Featherbed	ES2	AMC ES2
	12	Model 7

Norton Serial Numbers	Year	No.	Year	No.	Year	No.
Some overlap of numbers occurred from one model year, or calendar year, to the next, some these numbers are approximate only & relate to the year's end.   Also, Electra: July 1963 - 650 Sept. 1964 - 6201 Aug 1965 - 7961	1945	1001	1956	66600	1967	119760
	1946	2131	1957	71360	1968	124300
	1947	7756	1958	77400	1969	130000
	1948	13792	1959	80488	1970	134700
	1949	20701	1960	87038	1971	141700
	1950	27100	1961	94500	1972	200001
	1951	35560	1962	101060	1973	212278
	1952	42700	1963	105000	1973	300000 (850)
	1953	48900	1964	108000	1974	307311
	1954	55350	1965	111650	1975	325000 (MkIII)
	1955	60700	1966	115870		125001 (frame)

Technical Info. > Engine & Frame Numbers > Norton : Triumph : BSA