Royal Oak Double Balance Wheel Openworked

The Audemars Piguet Royal Oak Double Balance Wheel Openworked 15416CD.OO.1225CD.01 pairs a modern material milestone with one of AP’s most technical in-house architectures. It introduces “Bleu Nuit, Nuage 50” ceramic to the Royal Oak line, delivering a deep, saturated blue that contrasts sharply with the rhodium-toned openworked calibre and emphasises the watch’s layered, architectural depth. The 41 mm ceramic case measures just 9.7 mm thick, capped front and back with glareproofed sapphire for full visibility of the movement. A titanium caseback and titanium AP folding clasp help balance the feel on-wrist, while water resistance is rated to 50 m, practical for daily use without pretending to be a dive piece. The matching ceramic bracelet maintains the Royal Oak’s angular ergonomics and crisp finishing cues, but with ceramic’s high scratch resistance and colour stability.

Dial-side, the movement becomes the dial: a “Bleu Nuit, Nuage 50” inner bezel frames the openworked bridges, while 18-carat pink gold hour markers and hands, filled with luminescent material, provide legibility against the mechanical backdrop. Power comes from the self-winding Calibre 3132, running at 3 Hz (21,600 vph) with a 45-hour reserve. Its 245-part construction uses 38 jewels and integrates AP’s patented double balance wheel mechanism, designed to improve rate stability and precision by enhancing oscillation consistency. This particular piece is a pre-owned example in mint condition with box, papers and warranty dated Sept 2025.