The Zenith Defy Revival 03.A3648.670/21.M3648 is a modern reissue of the original 1969 Defy diver's watch. It features a 37mm stainless steel octagonal case with a fourteen-sided unidirectional rotating bezel, incorporating an orange-tinted sapphire insert. The black and orange dial includes luminescent hands and markers for enhanced visibility. Powered by the Elite 670 automatic movement, it offers a 50-hour power reserve. The watch is water-resistant up to 600 meters and comes with a stainless steel bracelet equipped with a folding clasp. Reference number: 03.A3648.670/21.M3648.