Patek Philippe, Super Complex Function timepiece, Model: 5159G-001, Automatic mechanical, 18k white gold, case diameter: This 38mm watch is a perpetual calendar + moon phase complex function wristwatch. The dial integrates the display of day of the week, month, date and moon phase. It is equipped with Patek Philippe's signature "automatic return date hand" design, eliminating the need for manual date adjustment in small months. It is an automatic jumping double p single watch suitable for leap years and large and small months.