“Matching numbers” means the major parts are the ones the car left the factory with. On a collectable car that can be a third of the price.
Where to look
The chassis number is on a plate and stamped into the body. The engine and gearbox carry their own stamps, often partly hidden by brackets or dirt.
Reading them
Factory records or a build sheet list the numbers each car was built with. Clubs and marque registries can often confirm them for a small fee.
What a mismatch costs
A period-correct replacement engine is not a disaster, but it should be priced in. On rare models the difference can be large, so get it in writing.
Restamped parts
Fresh, uneven or oddly deep stamps are a warning sign. When in doubt, ask a specialist to look before you pay a deposit.
On “Matching numbers: why they matter”.
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