Audemars Piguet Royal Oak Chronograph Steel/Yellow Gold — Black Dial | Ref. 26240SA.OO.1320SA.01

The two-tone proposition has always occupied a particular place in the Royal Oak's repertoire — the pairing of stainless steel and yellow gold evoking a warmth and versatility that mono-material configurations cannot match. Reference 26240SA.OO.1320SA.01 executes this marriage at 41 mm, with the Genta-designed octagonal case rendered in brushed and polished stainless steel, while the bezel, crown, and pushpieces are crafted in 18-carat yellow gold. The contrast is precise and intentional, each material reinforcing the other's character rather than competing with it.

Calibre 4401 — Audemars Piguet's fully in-house manufacture flyback chronograph movement — powers this reference, beating at 21,600 vph with a column-wheel control system and a horizontal clutch that ensures smooth chronograph engagement without disrupting the mainspring. The movement delivers approximately 70 hours of power reserve, a specification that speaks to the calibre's impressive architecture. The black dial, set against the gold bezel, creates a graphic clarity that renders hours, minutes, and chronograph counters immediately legible, while luminous hands ensure the same clarity at night. The glareproofed sapphire crystal protects the dial without introducing unwanted reflections.

The integrated yellow gold bracelet, closing via the AP folding clasp, gives the piece a weight on the wrist that communicates material quality with every movement. Water resistance to 50 metres reflects the Royal Oak's founding ethos as a true sports watch — an ethos that the chronograph complication amplifies, transforming an already capable timekeeping instrument into a genuine measurement tool. At $78,599 complete with box and papers, this reference is an exceptionally nuanced entry in the 41 mm Royal Oak Chronograph catalogue, one where the two-tone execution elevates the piece across both casual and formal contexts.