Triumph Serial Numbers Years

Triumph Engine and Frame Numbering from 1950 – 1988 Triumph – Twins 1950 – 69 Year Engine No. Building Material Estimating Software Free Download. Unit 350 & 500cc Engine No. Pre-Unit 500 & 650cc Engine & frame numbers on these models were all the same & were preceded by the model code. The N suffix was used in 1950 & NA for 1951/2. 350/500 twins all used an H prefix. The 650 models with the duplex frame used a D prefix & unit 650 duplex used a DU prefix.

Additional suffixes were used to designate model type or condition eg. TT (model type), C (high compression) or P (police). Some of these only appeared in certain markets.

Triumph Engine and Frame Serial Number Guide for years 1950 through 1983. * From 1969, frame and engine numbers used a 2 letter prefix. The first letter denoted the.

1950 From 100N 1951 101NA – 15808NA 1952 15809NA – 25000NA, then 25000 – 32303 – 44135 – 56700 – 70930 – 82799, then 0100 – 0944 1957 H101 – H760 0945 – 0 H761 – H5484 011116 – 0 H5485 – H76 – 0 H11512 – H64 – 030424, then D101 – D7726 1961 H18612 – H25251 D7727 – D H25252 – H29732 D15789 on Engine No. Unit 650cc 1963 H29733 – H32464 DU101 – DU5824 1964 H32465 – H35986 DU5825 – DU H35987 – H40527 DU13375 – DU H40528 – H49832 DU24875 – DU H49833 – H57082 DU44394 – DU H57083 – H65572 DU66246 – DU H65573 – H67331 DU85904 – DU90282. Triumph Twins, Triples & Singles – 1969-1983 Letter Month Model Year During 1969 a new numbering system was introduced which used a two-letter prefix indicating month & year, followed by the model type & the serial number. The first letter is the month, the second the year. This system used the Triumph model year not calendar year, which ran from August of the previous year to July of the current year. From July 1980 a third letter A was added to allow the system to keep going.