This Patek is 41 mm rose gold case, 12.4 mm thick, interchangeable full back and sapphire-crystal back, ebony black sunburst dial, caliber CH 29-535 PS Q manually wound movement with day, month, leap year and day/night display in apertures, date by hand, tachymeter scale, approximately 55-65 hours of power reserve, rose gold bracelet, fold-over buckle. Water resistant to 30 m.