News · Jaeger-LeCoultre

Jaeger-LeCoultre puts 15 complications into a one-off Grande Sonnerie

The 45mm pink-gold pièce unique uses three barrels to run its timekeeping, calendar and automatic striking works.

Hen & Mills Editorial · 4 min read · 10 September 2026

• Calibre 182 combines 15 complications, including grande sonnerie, petite sonnerie, minute repeater, perpetual calendar and flying tourbillon.
• One barrel powers timekeeping, a second runs the chiming gear train and a third powers activation of the crown-pusher minute repeater.
• Reference Q603H480 is a one-off pink-gold watch and Jaeger-LeCoultre has not announced a price.

Jaeger-LeCoultre has built a single Duometre Grande Complication à Grande Sonnerie around a new interpretation of its hand-wound Calibre 182, first introduced in 2009. Announced on 9 September 2026, the pink-gold pièce unique combines a grande sonnerie, petite sonnerie, minute repeater, perpetual calendar and flying tourbillon in a 45mm case. Fifteen complications share the watch, while separate energy stores protect timekeeping from the demand of striking as many as 992 notes in petite sonnerie mode.

A striking watch with three barrels

A grande sonnerie sounds the hours and quarters automatically, while a petite sonnerie strikes the hours. A minute repeater chimes the time on demand. Putting all three modes into one wristwatch is already difficult because the mechanism must control a sequence of hammers, gongs and safety devices. Calibre 182 then adds a perpetual calendar and tourbillon, turning the project into an exercise in distributing both energy and information without letting the chimes disturb the rate.

Jaeger-LeCoultre addresses that problem with three barrels. One powers the time and calendar for 48 hours. A second main barrel powers the chiming gear train, providing a stated seven-and-a-half-hour reserve and up to 616 notes in grande sonnerie mode, or 32 hours and up to 992 notes in petite sonnerie mode. The third barrel supplies the energy that a conventional minute-repeater slide would normally add, allowing the repeater to use a pusher in the crown.

The Duometre idea scales up

The Duometre name has long signalled separate sources of energy for different functions. Here the display and calendar retain their own supply, the chiming gear train has a main barrel, and a third barrel powers activation of the minute repeater. The intent is to stop each chiming sequence from pulling directly against the going train. In practical terms, the owner can choose the audible mode without treating every strike as a trade against basic timekeeping reserve.

Calibre 182 is visible through the sapphire crystal caseback. The hand-wound movement sits in a titanium inner case, surrounded by an 18-carat 5N pink-gold outer case. Jaeger-LeCoultre has not published a price. Its specifications instead read as a technical statement: 15 complications, three barrels, a flying tourbillon and three different ways to sound the time.

Openworking keeps the mechanisms legible

The front is openworked, with blue-grey lacquer used to separate display surfaces from the surrounding mechanics. Time is read from the main dial, while the perpetual calendar spreads its information across the layout rather than hiding it behind a single aperture. The flying tourbillon remains visible, and the exposed components make the chiming system part of the watch's appearance rather than a secret reserved for the caseback.

At 45mm across and 16.16mm thick, this is not an attempt at discreet formal wear. Those dimensions house the movement, the acoustic space and the control system required by the sonnerie functions. A black alligator strap keeps the exterior materials conventional beside the more unusual titanium inner body. The large case also gives the calendar and power information enough room to be read around the openworked construction.

Why 992 notes matters

Repeater specifications are often reduced to the number of gongs or hammers. The stronger measure here is how long the watch can continue to strike automatically. Petite sonnerie mode's 32-hour reserve and maximum 992-note output show the workload carried by the main chiming barrel. Grande sonnerie mode is more demanding because it sounds both the hour and quarter sequences, explaining its shorter seven-and-a-half-hour reserve from the same dedicated energy system.

The perpetual calendar adds another kind of duration. Once set, it accounts for varying month lengths and leap years, provided the watch remains wound. That long-horizon calculation sits beside a sonnerie designed around repeated events every quarter hour. The result is less a single headline complication than a set of mechanisms operating on radically different timescales, all organised within one manually wound calibre.

Because the piece is unique, those specifications also define the watch more reliably than comparisons with an ordinary collection. There is no second dial colour or case metal to dilute the premise. Reference Q603H480 is the complete project: Calibre 182, the blue-grey openworked display, the two-metal case and the full chiming programme.

Duometre Grande Complication à Grande Sonnerie price and availability

Jaeger-LeCoultre describes reference Q603H480 as a pièce unique, so it is limited to one watch. The manufacture has not announced a price or a conventional retail release. The published materials present it as a technical demonstration of Calibre 182 and the Duometre approach to managing energy. A price should not be inferred from other grand-complication watches.