5159J-001 Men's Grand Complications Description Two venerable Patek Philippe traditions unite: the perpetual calendar with retrograde date and the officer’s-style case. This slightly enlarged new model features a resolutely contemporary dial with a hand-guilloched pattern. Technical data Watch: * Caliber 315 S QR * Mechanical self-winding movement * Perpetual calendar with retrograde date hand * Day, month, leap year in apertures * Moon phases * Center sweep second hand * Silvery opaline dial, hand-guilloched center, black Roman numerals * Fold-over clasp * Sapphire crystal case back protected by a hinged dust cover * Water resistant to 30 m * Case diameter: 38 mm * Yellow Gold Caliber: * Perpetual calendar with retrograde date hand * Day, month, leap year in apertures * Moon phases * Center sweep second hand * Overall diameter: 28 mm * Height: 5.25 mm * 30 jewels, 9 bridges