Driving Ambition, page 227:
"Fabian Giroix (GRT) raced a new F1 GTR with J-DD, backed by Franck Muller Technowatch, the swiss watchmaker. AMG meanwhile bought the '95 model and were to use it as a test bed for their forthcoming V12-engined endurance challenger"
The 95 model mentioned is 07R as that was the one GRT owned.
Thank God for Driving Ambition