The Supersonnerie is Audemars Piguet's answer to the oldest problem in chiming watches — a repeater loud enough to hear properly, in a case sealed enough to wear. Reference: 26577PT Full reference: 26577PT.XX.DXXXCA.XX Sapphire A high-jewellery execution of Audemars Piguet's Royal Oak Concept Supersonnerie RD#1, combining the brand's minute repeater research with a full platinum case and baguette sapphire setting. Built to project real volume on the wrist, the Supersonnerie architecture rethinks how sound is transmitted through the case, delivering a remarkably clear, powerful chime in a modern Concept silhouette. This example is finished in 950 platinum and enhanced with deep-blue baguette sapphires across the bezel and casework, framing the openworked dial with blue accents and the signature Concept minute track. A rare intersection of acoustic engineering, haute horlogerie and jewellery craft. 44 mm case, 950 platinum, sapphire-set bezel/case; Manual-winding calibre 2937; Minute repeater (Supersonnerie), tourbillon, chronograph; Power reserve: approx. 42 hours; Sapphire crystal and display back; Water resistance: 20 m; Strap: blue rubber, clasp per configuration; Price on request. Maker: Audemars Piguet. Reference: 26577. Available through ELITA's private desk — verification review, discreet handling and storage. Price on request. Case Size: 44 mm. Case Material: 950 platinum, sapphire-set. Movement: Manual-winding calibre 2937. Dial: Openworked dial with blue accents and Concept minute track. Bezel: Deep-blue baguette sapphire-set bezel and casework. Bracelet/Strap: Blue rubber. Complications: Minute repeater (Supersonnerie), tourbillon, chronograph.