BF's new AP/Audemars Piguet Royal Oak series 26331OR chronograph, using the same as the original (6-digit small seconds) 7750 chronograph movement, the 316 stainless steel case has been brushed and partially polished and polished, showing a delicate and rigid Unique temperament, rough and atmospheric 41mm dial, full of strength, super luminous display, can read the time in any environment