The picture shown is of an early Jaguar factory XJS-C showing the Kent GKN wheels
The XJS-C was a joint programme between Jaguar and Aston-Martin Tickford, Tickford having had unrivalled experience in the field of convertibles since the 1930's
The firts 500 odd cars built where in fact standard XJS coupes that where sent to Tickford and had the roofs cut off after this Jaguar had production bodyshells made and the cars where built in house.
I believe the correct answer to this question is:
Aston Martin Tickford ??