Audemars Piguet Royal Oak Selfwinding Flying Tourbillon Openworked 26735SG.OO.1320SG.01 – Sand Gold / 41 mm Brand New • Unworn • Full Set • Limited Production This Audemars Piguet Royal Oak Selfwinding Flying Tourbillon Openworked is crafted entirely from 18K Sand Gold, a proprietary alloy developed by AP that strikes a perfect balance between rose and white gold, giving the watch a warm and dynamic tone that changes subtly with the light. The 41 mm case and integrated bracelet retain the iconic Royal Oak proportions, finished with AP’s signature brushed surfaces and polished bevels. The skeletonized dial reveals the intricate architecture of the Calibre 2972, AP’s in-house automatic movement with a flying tourbillon visible at 6 o’clock. The movement operates at 21,600 vph (3 Hz), has a power reserve of 65 hours, and features meticulously finished bridges and rhodium-tone accents, all visible through the openworked dial and sapphire caseback. The integrated Sand Gold bracelet complements the case perfectly, completing a cohesive and modern luxury look.