AUDEMARS PIGUET | ROYAL OAK, REF 25654BA YELLOW GOLD PERPETUAL CALENDAR WRISTWATCH WITH MOON PHASES AND BRACELET CIRCA 1990

The Royal Oak revolutionised the industry and created a new category: "stainless steel sports watches". The novelty, designed by Gérald Genta, coincided with the tendency for less ostentatious watches as the focus had shifted towards understatement and quality. The Royal Oak was an all-purpose watch that was the perfect fit for different occasions ranging from daily use to formal occasions.  

The perpetual calendar is a complication that has very long ties with Audemars Piguet. Since the 1910s, Audemars Piguet have been producing stylized unique perpetual calendar watches that were highly differentiated from those that were made from other leading Swiss brands. As the popularity of complicated wristwatches increased, in 1955 Audemars Piguet produced the world’s first perpetual calendar wristwatch that would feature a leap year indication.