Swiss Haute Horlogerie manufacturer Audemars Piguet has teamed up with American singer, guitarist, watch collector and longstanding friend of the brand John Mayer to design the last iteration of the Royal Oak Perpetual Calendar equipped with the Manufacture’s self-winding Calibre 5134. For the occasion, John Mayer has applied his sensibilities to create a distinctive timepiece, limited to 200 pieces, that combines the aesthetic power of the Royal Oak with the refinement and astronomical roots of the perpetual calendar. The result is a timelessly elegant watch in 18-carat white gold, enhanced by a deep blue dial where every detail speaks in unison to create a landscape evocative of a crystal sky.