Unlike the US of A manufacturers, Triumph had very few options. These
included
Overdrive - designated by the commission number ending in "O" (Oh, not zero)
i.e. CC25064LO Having an overdrive may or may not imply a
different rear end ratio. TR4 cars had 4.1 gears fitted with
overdrive, TR6s all had 3.7
Hardtops - should be obvious if the car has a factory steel top.
Colors - The main body and trim colors are on the commission number plate,
various catalogs and workshop manuals have the number -> color
mappings. Unfortunately, I can't remember what colors were made
available in what years.
Interior trim style - The TR-4 and possibly the TR-250 had the option of
different seat insert material, with the choices being standard
vinyl, leatherette cloth and real leather. This is designated
by a letter (or lack thereof for standard) appended to the trim
color code.
Basically the commission numbers of the cars tell very little about it, other
than model and sequence in manufacture. For example, the number above,
CC25064LO means:
CC TR6
25064 The 64th TR6 built, as they started with 25001 (2500 being the size of
the 6 cylinder engine.
L Left hand drive
O Overdrive fitted.
For what I beleive is now $20 US you can have various build info and initial
destination of a car traced through British Motor Heritage or some such. I
had in the past posted the address and the range of cars covered, I may still
have that info.
mjb.
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