Model Katya Portnyagina spotted wearing a Audemars Piguet

Spotted aboard what appears to be a leisure boat at sunset, model Katya Portnyagina is wearing an Audemars Piguet Royal Oak Lady in 37mm stainless steel — a configuration that has become one of the most sought-after references in the current AP catalogue. The setting is casual, but the watch is anything but.

The reference in question is almost certainly 15451ST.ZZ.1256ST.03, introduced as part of AP's 2020 refresh of the Royal Oak Lady line. The 37mm case diameter was a deliberate move by the manufacture to bridge the gap between the classic 33mm lady's format and the unisex 41mm — a sweet spot that opened the model to a broader, style-conscious audience without diluting the original Genta DNA. The integrated stainless steel bracelet, signature exposed hexagonal screws, and the Méga Tapisserie blue dial are immediately recognizable. The diamond-set bezel features 40 brilliant-cut stones totaling approximately 0.59 carats, factory-fitted by AP's in-house gem-setting atelier in Le Brassus.

Powering the watch is Calibre 5800, AP's self-winding movement beating at 28,800 vph with a 50-hour power reserve — a movement that prioritizes reliability and thinness within the Royal Oak's notoriously slim case profile. Water resistance is rated to 50 meters.

From a collector standpoint, the Royal Oak Lady 37mm diamond bezel occupies an interesting position: it commands a premium over the no-diamond variant, yet retains strong resale liquidity because the blue dial and steel configuration attract both watch collectors and luxury lifestyle buyers. On the grey market, examples regularly trade above retail, a dynamic that has persisted since AP tightened authorized dealer allocations post-2020.

Katya Portnyagina's choice here reads as considered rather than conspicuous — the blue dial echoes the color palette of the sunset shoot while the diamond bezel adds dimension without overwhelming the watch's architectural geometry. With a grey-market value hovering near $50,000 USD, this is a wrist statement that speaks fluent horological.