Patek Philippe Annual Calendar Series, Pre-owned. White gold case and bracelet set with diamonds on the fixed bezel and white dial hour markers. White mother-of-pearl or diamond dial with silver-tone hands displaying hours, minutes, seconds at 6 o'clock position; date and day indicators elsewhere. Hand wind movement powered by manual winding. Sapphire crystal glass for scratch resistance. Transparent case back allowing view of the mechanism. Round 37 mm case shape. Fold over clasp equipped with a safety release buckle. Functions include: hour, minute, second indication; calendar displaying month, date, and day automatically until hand setting occurs (annual leap year function). Swiss Made label on dress watch style.