The first Grand Complication in the Nautilus collection, the Reference 5740/1G Nautilus perpetual calendar, offers a distinctive blend of sports appeal and technical sophistication. Thanks to the famous ultra-thin self-winding caliber 240 Q movement, which offers day, date, month, leap year and 24-hour functions. The 40 mm white gold case (water resistant to 60 m) is remarkably svelte, making this watch Patek Philippe’s thinnest perpetual calendar. Screw down crown, sapphire crystal case back. The bezel is also constructed from white gold, the blue sunburst dial has gold applied hour markers treated with luminescent coating. This piece is complimented by a white gold bracelet and is equipped with a new fold-over clasp providing optimized security. Offering a maximum power reserve of 48 hours.