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The Audemars Piguet Royal Oak Offshore Selfwinding Diver 15720ST.OO.A403CA.01 debuted in 2026 as part of the 42 mm Offshore Diver family and is characterised by a stainless steel case combined with abyssal blue and pink gold dial accents. The case measures 42 mm in diameter with a thickness of 14.2 mm. It is manufactured in stainless steel and fitted with black ceramic screw-down crowns featuring 18-carat pink gold crown chips. Sapphire crystals are used on both the dial side and caseback. Water resistance is rated to 300 metres. The dial is executed in abyssal blue Méga Tapisserie and features a white 15-minute segment on the diving scale. The hands and applied hour markers are crafted from 18-carat pink gold and filled with luminescent material. A black inner bezel frames the display. Time indications consist of hours, minutes, central seconds, and a date aperture. The watch is delivered on an interchangeable abyssal blue rubber strap secured by a stainless steel pin buckle. Power is supplied by the selfwinding Calibre 4308. The movement operates at 28,800 vibrations per hour (4 Hz), comprises 234 components and 32 jewels, measures 32 mm in diameter with a thickness of 5.2 mm, and offers an approximate power reserve of 60 hours.