Patek Philippe Nautilus Watches. 40mm 18K rose gold case, sapphire crystal back, screw-down crown, black-brown dial with gold applied hour markers with luminescent coating, self-winding caliber 240 PS IRM C LU movement with power reserve, date by hand, moon phases, seconds subdial, approximately 48 hour of power reserve, leather strap with fold-over buckle. Water resistant to 120 meters.Patek Philippe Watches Nautilus Mens Rose Gold 5712R-001.????Reference Number5712R-001Case Size40 mmFace ColorBlack brownHour MarkersGold applied hour markers with luminescent coatingCase Material18k Rose GoldMovementMechanical (Automatic)Bracelet MaterialMatte dark brown alligatorClasp TypeFold-over clasp.FeaturesPower reserve indicator. Seconds subdialCasebackSapphire-crystal case backModelNautilusWater Resistance Rating60 mBox/PapersOriginal Patek Philippe Box and PapersWarrantyBalance of Patek Philippe 2-year WarrantyCountry/Region of ManufactureSwitzerlandDisplayAnalogOfficial Patek.com page??