Triumph - Twins 1950 - 1960

Engine Number.            Engine Number.              

Unit 350&500cc           Pre unit 500 & 650cc

Engine and frame numbers on these models were all the same and were preceded by the model code. The N suffix was used in 1950 and NA for 1951-1952. 350-500 twins all used and H prefix. The 650 models with the duplex used a D prefix and unit 650 deplex used a DU prefix. Additional suffixes were used to designate model type or condition e.g TT ( model type), C (high compression or P (police). Some of these only appeared in certain markets

1950

1951

1952

1953

1954

1955

1956

1957 H101-H760

1958 H761-H5484

1959 H5485-H11511

1960 H11512-H18611

1961 H18612-H25251

1962 H25252-H29732

1963 H29733-H32464

1964 H32465-H35986

1965 H35987-H40527

1966 H40528-H49832

1967 H49833-H57082

1968 H57083-H65572

1969 H65573-H67331

From 100N

101NA-15808NA

15809NA - 25000NZ then 25000  -

32302

32303-44134

44135-56699

56700-70929

70930-82799, then 0100-0944

0945-011115

011116-020075

020076-029363

029364-030424, then D101-D7726

D7727-D15788

D15789  on

ENGINE NUMBER. UNIT 650cc

DU101-DU5824

DU5825-DU13374

DU13375-DU24874

DU24875-DU44393

DU44394-DU66245

DU66246-DU85903

DU85904-DU90282