Stainless Steel, Pilot bracelet with flip-lock clasp, unidirectional rotating bezel, black Roman dial, automatic Chronometer (Cal. B01 (in-house)), 12-hour column-wheel chronograph, instantaneous date, screw-down crown and pushers, 70-hour power reserve, special 30th Anniversary Edition (500 pieces made), Ref. AB01153A/BH26, warranty dated June 2020, 43.5mm, Like New in Box with Papers