Reference
Decode plates, paint, and parts.
What we can stand behind, and — just as usefully — what we can't yet. Pages that still need sourcing say so rather than reading as authoritative.
Tool
Number decoder
Paste a commission number or a 1979–81 VIN. It reads the structure, names the series, and tells you whether the car is already registered.
Commission numbers
How to read a pre-1979 Spitfire chassis tag, and where to find it.
VIN numbers, 1979–81
The modern-format numbers that replaced commission numbers on late 1500s.
Heritage certificates
How to order the factory build record for your car.
Model era guide
What changed between Mk1 and 1500, and how to tell them apart.
Triumph paint codesNeeds sourcing
Matching an original colour — chart not yet sourced.