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Basketball player LeBron James spotted wearing Audemars Piguet

LeBron James marked another birthday in characteristic style, surfacing in public wearing one of Audemars Piguet's most architecturally striking timepieces — the Royal Oak Frosted Gold Open-Worked in 18K white gold, reference 15407BC. The sighting drew immediate attention from watch enthusiasts, and for good reason: this particular Royal Oak sits at the intersection of two distinct and demanding craft disciplines rarely executed with this level of coherence.

The ref. 15407BC houses Calibre 3132, a self-winding movement built on the architecture of the legendary 2121 but adapted for skeletonization. Every bridge, rotor, and plate is hand-beveled and finished to the same exacting standard Audemars Piguet applies to its solid-dialed counterparts — arguably a more labor-intensive proposition, since the movement is fully exposed to scrutiny. The 41mm case, rendered in 18K white gold, carries the iconic Gerald Genta-designed octagonal bezel with its eight hexagonal screws. Power reserve stands at approximately 60 hours.

What elevates this reference beyond a standard skeletonized Royal Oak is the frosted gold treatment — a collaboration with Florentine jeweler Carolina Bucci, first introduced in 2016 to mark the Royal Oak's 44th anniversary. The technique, derived from ancient Etruscan goldsmithing, uses a diamond-tipped burnishing tool to create thousands of microscopic indentations across the case and bracelet surfaces. The result is a matte, almost luminous sparkle that is categorically different from polished or brushed finishes and has no direct equivalent in the broader industry.

For James, a known Audemars Piguet loyalist whose wrist has seen everything from classic Royal Oak Chronographs to bespoke AP commissions, the 15407BC reads as a deliberate escalation — a collector's move rather than a brand statement. The frosted open-worked variant appeals to buyers who understand both the metallurgical craft and the horological complexity involved, and the white gold execution adds a cooler, more formal register than the yellow or rose gold alternatives.

At a retail list price of approximately $100,400, the ref. 15407BC already occupies premium Royal Oak territory. On the grey market, demand has pushed valuations to an estimated $350,000 — a premium that reflects both the technical rarity of the piece and the enduring collector appetite for anything that merges AP's movement expertise with its most distinctive decorative innovation. For a birthday watch, it sets a high bar.