Mens Zenith Chronomaster XXT Tourbillion Watch, 18kt white gold case (45mm diameter) with see-through sapphire crystal caseback, crocodile leather strap with 18kt white gold triple-folding buckle, black dial with silver hands and applied silver hour indicies, perpetual calendar (date, day, month, year) functions and moonphase indicator, El Primero #4003 self-winding mechanical movement, scratch-resistant sapphire crystal, water-resistant to 30 meters.