Patek Philippe. An extraordinary and sought after Patek Philippe reference 3940 First Series in yellow gold with perpetual calendar, moon phases and original certificate Model: Grand Complication Material: yellow gold Reference N°: 3940 Year: 1987 Case N°: 2884589 Caliber: 240Q Movement N°: 772155 Bracelet: leather strap Dimensions: 36 mm Signed: 772155