my chassis number is 24101090a and there is no contract number on a data plate,The no 77 AA 46 was on the base of the drivers seat,But when the card came for this land rover it was not the same chassis no so it isn't 77 AA 46.The build date and dispatched to FVRDE info came from the land rover build data held at the British Motor Industry Heritage Trust Archive Department Heritage Motor Centre Banbury Road Gaydon hope this clarifies things.