Tim at Minimail in link below has lots of info on Commission Plates, etc here:-
"This was fitted to cars 1967-1980 in addition to the chassis plate as an extra way of identifying model and detail
changes. It is not a vital part of the identity for legal purposes, and no records exist of the numbers with the original
manufacturers. If you want a plate done to restore the car to as original as possible and you have lost the original, we
can supply a plate and put on a number that would be approximately right for the age of the car according to our
researches. The prefix would be specific to each model; the serial number we will have to guess. We don’t need proof
of ownership for just one of these plates."
Edited by mab01uk, 07 November 2023 - 08:53 PM.