Audemars Piguet Royal Oak Minute Repeater Supersonnerie Titanium & Platinum — Burgundy Dial | Ref. 26591IP.OO.1252IP.01

The Supersonnerie is AP's most significant acoustic engineering achievement in the field of striking watches, and the 26591IP delivers it within the architectural framework of the Royal Oak in a pairing of grade 5 titanium and platinum that is as technically purposeful as it is materially distinguished. The 42 mm titanium case provides an ideal resonating chamber for the minute repeater's hammers and gongs — titanium's specific acoustic properties, combined with a patented gong attachment system, allow the Supersonnerie to project sound with a clarity, volume, and musical balance that traditional gold repeaters cannot match. The platinum bezel adds a cool, dense contrast to the brushed titanium flanks.

The hand-wound movement within, a bespoke calibre of extraordinary complexity, drives the minute repeater mechanism through a cathedral gong system activated by a slide on the case band. On demand, it chimes the hours, quarter-hours, and minutes in a rich, cathedral-like tone — hence the Supersonnerie name. A patented soundbox integrated within the caseback architecture channels acoustic energy toward the wrist with exceptional efficiency. Every component of the striking train is hand-finished and regulated, the tolerances held to fractions of a millimetre to ensure consistent tonal quality across every chime sequence.

The burgundy dial — a deep, wine-toned surface of extraordinary richness — is indexed with applied luminous hour-markers and swept by luminescent Royal Oak hands, providing vivid contrast against the dark ground. The screw-locked crown and 20-metre water resistance reflect the careful engineering required to maintain acoustic performance without compromising mechanical sealing. An AP folding clasp secures the strap with the same rigour that governs the entire reference. At $359,999, the 26591IP represents the pinnacle of Royal Oak acoustic watchmaking — a true grand complication for the collector who listens as attentively as they look.