The Audemars Piguet Royal Oak Openworked Extra-Thin is a limited edition of 40 pieces created in honor of the 40th anniversary of the model series. It features a platinum case and a skeletonized version of the famous caliber 2121 movement.
Slim (3.05mm) self-winding movement, originally created by Jaeger-LeCoultre and used by Audemars Piguet, Vacheron Constantin and Patek Philippe; skeletonized with manual finish on both bridges and mainplate. Sapphire calendar disc.
