Patek Philippe 6159G Retrograde Perpetual Calendar 18K White Gold Black Dial 2026

This Patek Philippe Retrograde Perpetual Calendar reference 6159G-001 brings one of the maison's most recognizable calendar layouts into a more contemporary register. Its self-winding caliber 26-330 S QR drives the retrograde perpetual calendar with moonphase, pairing a modern base movement with one of Patek's longest-standing complications. The reference stands apart for joining that mechanism to a more assertive case and dial treatment than the brand usually gives the complication, which gives it a different place in the line for a collector choosing among perpetual calendars. In 18k white gold, the case measures 39.5mm across and 11.5mm thick, a size that gives the watch more presence than the slimmer classics that shaped the category. The gray-tinted sapphire crystal dial, which reveals the calendar mechanism beneath, sharpens that shift in tone without disturbing the familiar arc of the retrograde date. It is a perpetual calendar that shows Patek moving a formal complication into a more contemporary key without surrendering any of the refinement that made the layout endure.