Introducing the Audemars Piguet Royal Oak Selfwinding Chronograph 26240OR.OO.1320OR.01. The 41mm case is made of 18k rose gold and complements the Grande Tapisserie dial in blue (Bleu Nuit, Nuage50). Luminescent rose 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 "50th Anniversary" oscillating weight. The calibre 4401 powers all of the watch's complications, including Flyback chronograph timekeeping and date features.