Introducing the Audemars Piguet Royal Oak Selfwinding Chronograph 26240BA.OO.1320BA.02. The 41mm case is made of 18k yellow gold and complements the matching Grande Tapisserie dial in smoked yellow gold. Luminescent yellow gold hand and hour markers work with the Sapphire glare-proofed crystal for optimal legibility in any condition. An exhibition case back gives a glimpse at the Calibre 4401 in action, powering all of the watch's complications, including Flyback chronograph timekeeping and date features.