The Royal Oak 15201TS.OO.0944TS.01 is a limited edition of 10 pieces created in honor of the 10th anniversary of the ThePurists (now: WatchProSite) discussion board. It features a stainless steel case with tantalum bezel and mid links. It is powered by caliber 2121 with partial skeletonizing and a special rotor.
Slim (3.05mm) self-winding movement, originally created by Jaeger-LeCoultre and used by Audemars Piguet, Vacheron Constantin and Patek Philippe.