Well the simple thing with the seats will be to look underneath. Real leather will look entirely different from manufactured vinyl.
As to the year, it may have been refurbished with latter door cards.
DVLA should know the year, however YJ is a Dundee allocation, so is the Log book annotated as 'Not Transferable'?
Surplus unused Scottish registrations are often used by DVLA to give an age related plate to a car that has been off the authorities books so the original plate is 'lost'.
I noticed the removal of the Trafficators looks a professional job.
There might be a small discrepancy in the actual year of manufacture.
If it was a 61-63 car, it would have a DB10 relay indicator system factory fitted, which could have subsequently been altered to have separate indicators. Have you got one of these on the wing?

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