The Ultrathin Tourbillon Skeleton from Arnold & Son is available in either red gold or platinum, each limited to only 28 pieces. The timepiece has a 41.5 mm case with a remarkable thinness of just 8.4 mm, framing the A&S8320 calibre, one of the slimmest skeleton tourbillon movements at 3.3 mm. Precision engineering is evident with its variable-inertia balance, ensuring superior calibration stability. Craftsmanship shines through with the skeletonized movement, highlighting sweeping curves and expert finishes. Rose-gold PVD-coated bridges with Côtes de Genève stripes and a signature Arnold & Son flange encapsulate the brand’s legacy. The heart of the watch, the A&S8320 calibre, is a 1-minute flying tourbillon without an upper bridge, offering a sleeker profile. The tourbillon carriage, completing a rotation per minute, serves as a delicate seconds indicator. With a substantial 100-hour power reserve, this calibre exceeds expectations for ultra-thin timepieces, maintaining Arnold & Son’s reputation for exceptional performance.