The Royal Oak Tourbillon Extra-Thin Openworked 26518OR.OO.1220OR.01 is a modern icon — merging the historic Royal Oak design DNA with the brand’s highest expressions of skeletonization and ultra-thin horology. Made for connoisseurs who value transparency, complexity, and elegance, it stands as a testament to Audemars Piguet’s place at the pinnacle of fine Swiss watchmaking.