Model Hailey Rhode Baldwin spotted wearing a Audemars Piguet

Hailey Bieber was recently photographed wearing what is unmistakably a Ladies Audemars Piguet Royal Oak in stainless steel with a full diamond pavé treatment — a configuration that transforms Gerald Genta's 1972 sporting icon into a piece that sits squarely at the intersection of watchmaking and haute joaillerie. The sighting places one of fashion's most watched wrists firmly in AP's orbit, adding to a growing roster of celebrities who have gravitated toward the Royal Oak's unique architectural language.

The watch in question is almost certainly the Ladies Royal Oak 33mm fully set reference — likely the 67651ST.ZZ.1261ST.01 or a closely related full-set variant — featuring a stainless steel case and integrated bracelet where every visible surface has been hand-set with round brilliant diamonds. The dial itself is a diamond pavé, with baton hour markers in polished steel that emerge subtly from the stone setting. The movement inside is calibre 2800/2813, a self-winding automatic with a 40-hour power reserve, regulated to -4/+6 seconds per day — a reminder that beneath the jewellery-grade exterior is a precision Swiss manufacture movement.

The Royal Oak's significance in horological history is difficult to overstate. Launched in 1972 at a price deliberately higher than gold watches of the era, it pioneered the luxury sports watch category. The fully set ladies' variants arrived later as AP extended the collection, and they represent some of the most technically demanding pieces in production — the diamond-setting alone can require hundreds of hours of skilled artisan work per piece.

From a collector's standpoint, fully set Royal Oaks occupy a specific niche: they attract buyers who want the horological credibility of an AP manufacture piece combined with investment-grade diamond content. Unlike many diamond-set complications, the Royal Oak's integrated bracelet design means continuity of the stone setting across case and bracelet — a far more demanding execution than a bezel-only set.

Hailey Bieber's affinity for AP is well documented, and this sighting reinforces the brand's deep penetration into fashion and entertainment culture. At an estimated retail of around $46,500 USD, this fully set Royal Oak represents significant value relative to white gold equivalents, making steel full-set variants increasingly sought after on the secondary market.