The Patek Philippe reference 5087/1A is one of the rarest and most distinctive members of the Aquanaut family, combining the contemporary sporting design of the collection with the elegance of an integrated stainless steel bracelet. Introduced in the mid-2000s, the 5087 is powered by the high-precision quartz Calibre E23-250 S C, featuring central hours, minutes, sweep seconds and a date display. While retaining the Aquanaut's signature rounded octagonal bezel and embossed dial, it departs from the traditional composite strap by adopting a beautifully finished steel bracelet, giving the watch a more refined and versatile character.

Produced exclusively in stainless steel with a diamond-set bezel, the reference 5087/1A was manufactured in relatively small numbers before being discontinued, making it one of the most elusive ladies' Aquanaut references. Its combination of sporty styling, integrated bracelet and understated luxury bridges the gap between the Aquanaut and Nautilus collections, and today it is highly sought after by collectors who appreciate its rarity, distinctive design and unique place in the evolution of Patek Philippe's ladies' sports watches.