Patek Philippe Annual Calendar Collection 18-Karat white gold timepiece. This 40mm watch's features are: mechanical self winding movement, annual calendar, day-date-month in appetures, moon phases am/pm indicator, sweep seconds handprong buckle, sapphire crystal case back, and water resistant to 30 meters. This watch has a two-tone slate gray dial with gold applied hour markers displayed on an alligator strap.