In the DEFY XTREME OPEN, the El Primero 4021 SX roars at 36’000 vibrations per hour, protected by a special blade on which the 3-branched second hand revolves. The power reserve is split into sectors, all hands have Superluminova® inserts. Water-resistant to 1,000 meters, the case is in black titanium or in black titanium and […]