The first 3,000 will receive the 10:10 symbol in the form of an aluminium tag made from the cargo door of an old 747 jumbo jet.

The 747 had climbed to twenty-two thousand feet when the forward cargo door of the jet blew open, tearing a huge hole in the side of the plane.

Later-production aircraft had the chaff dispensers relocated to the cargo door.

A large forward cargo door (139 in/353 cm by 80 in/203 cm high) was incorporated.

They are being refitted with new landing gear supports, cargo door supports, center wing rainbow fittings, and corrosion repair.