In 1987, Audemars Piguet elevated this legendary design to new heights of opulence with the Haute Joaillerie version of the Royal Oak. This reference, 14575, was an exercise in extreme rarity; our research indicates only four units were sold between 1987 and 1990: one in yellow gold in 1987, two in yellow gold in 1988, and a final, unique piece in white gold in 1990. The present example, REF. 14575BC, is that breathtaking final watch—a piece unique in 18K white gold. It is a veritable cascade of light, with its bracelet, bezel, and dial meticulously paved with 578 brilliant- and baguette-cut diamonds, weighing approximately 15.53 carats. As the sole example crafted without a date window, it holds a distinct place in history. Derived from the unisex Model 14486—a 35 mm exception in an era of 36 mm Royal Oaks— this magnificent creation transcends mere timekeeping to stand as a singular work of art, representing the ultimate fusion of the Royal Oak’s iconic form with the highest expression of the jeweller’s craft.