Audemars Piguet 26510ST.OO.1220ST.01 (Pre-owned - Excellent) — USD 189,995 on eBay

The Audemars Piguet Royal Oak Selfwinding Flying Tourbillon reference 26510ST.OO.1220ST.01 represents the brand's integration of a flying tourbillon complication within the Royal Oak case architecture. This reference features a skeletonized dial construction that exposes the mechanical elements beneath. The 41mm stainless steel case houses the automatic caliber 2950 movement, which provides a 65-hour power reserve. The watch incorporates a fixed octagonal bezel and sapphire crystal, with water resistance rated to 50 meters. The reference is fitted with a steel bracelet and has been in production since 2019. This reference appeals to collectors seeking a tourbillon complication in stainless steel case material. The skeletonized dial treatment allows visibility of the movement's components, positioning this piece for those interested in visible mechanical complexity within the Royal Oak case format.