This dedicated Royal Oak “Jumbo” Extra-Thin is the last unique 15202 and the last unique piece powered by Calibre 2121, the thinnest automatic movement with central rotor and date indication of its time, first introduced on the Royal Oak in 1972. Heralding a new era, the case and bracelet combine sandblasted titanium with polished Bulk Metallic Glass – a first at Audemars Piguet. When cooled rapidly, this palladium-based alloy shares several characteristics with other glasses, including amorphicity, transparency and high strength, making it highly resistant to wear and corrosion. Its non-crystalline nature results in a unique play of light.