Audemars Piguet Royal Oak Double Balance Wheel Openwork 41mm Skeleton Stainless Steel (Reference # 15407ST.OO.1220ST.01)
The Royal Oak Double Balance wheel Openworked tackles these stabilising issues by fixing a second balance wheel and balance-spring assembly on the same axis. The new patented geometry involves a very complex manufacturing procedure, but the payoff is huge: greatly improved precision and stability. Stainless steel case, glareproofed sapphire crystal and caseback, screw-locked crown, water-resistant to 50 m.Slate grey openworked dial, pink gold applied hour-markers and Royal Oak hands with luminescent coating. Stainless steel bracelet with AP folding clasp.