Jaeger-LeCoultre watches introduced a new High Precision Guarantee and applied it to the Master Control Chronometre line at Watches & Wonders 2026, the brand said.
At the Geneva show, Jaeger-LeCoultre framed the move as a step to bring chronometric testing closer to real world wear, while also presenting new Master Control models and a Reverso Tribute Enamel series that highlights miniature enamel painting.
HPG testing for Jaeger-LeCoultre watches
The new High Precision Guarantee, or HPG, tightens the brand’s in house testing beyond its historical 1,000 Hours Control, Jaeger-LeCoultre said. The house also noted its long technical record, including more than 1,400 calibers and over 430 patents, which it said underpins this year’s developments.
HPG focuses on stability in real wear conditions, with simulated pressure changes from sea level to 1,004 meters, approximately 3,300 feet, and temperatures ranging from 18 to 35 degrees Celsius, or about 64 to 95 degrees Fahrenheit. The protocol also includes multi directional shock tests from 25G to 50G, and alternating wear and rest cycles, the brand said.
Jaeger-LeCoultre said results are kept within COSC chronometer accuracy limits, creating a double safeguard for watches that also carry official COSC certification.
Master Control Chronometre updates and calibers
The Master Control Chronometre is the first line to adopt HPG across the range, and each reference also holds an official COSC chronometer certificate, the company said. The three new references are a date model, a date with power reserve, and a perpetual calendar, each rated with 70 hours of power reserve.
The date with power reserve uses the new Caliber 738. The movement keeps a symmetrical layout with a power reserve at nine o’clock and a date at three o’clock, for clearer legibility in daily wear. The steel case measures 39 millimeters across and the case thickness is 9.2 millimeters, balancing visual proportion with wrist comfort.
The perpetual calendar carries Caliber 868, with a movement thickness of 4.72 millimeters and a 4 hertz balance frequency. The dial arranges month and year, day of week, date, and moonphase across four subdials, presented so the layout reads without crowding. The moonphase disc is executed in metal with a fine texture.
That perpetual calendar comes in stainless steel or 18 karat pink gold, both at 39 millimeters, and its mechanism remains valid through the year 2100 without routine correction, the brand said.
The simple date model returns to a pure proportion, powered by Caliber 899 in a 38 millimeter case and a thickness of 8.4 millimeters. Despite a central seconds hand, the movement has been reconfigured with staggered gearing to reduce overall height, enabling a thinner profile in daily use.
Case, bracelet, and finishing details
Design cues across the line include the classic round case and dauphine hands, with the addition of a first time integrated three row bracelet. The bracelet alternates brushed and polished finishes, with three dimensional center links and sharp outer chamfers that read as intentional geometry on the wrist.
The lugs are curved for comfort, and dials are offered in blue gray or an antique bronze tone with a sunray finish. The chapter ring scales are finely stamped to balance function and visual harmony.
All references show the movement through a sapphire crystal caseback, revealing Geneva stripes, perlage, polished screws, and beveled bridges. A skeletonized 22 karat pink gold rotor adds visual depth, a sign of the brand’s decorative priorities, the company said.
Reverso Tribute Enamel series honors Hokusai
The Reverso Tribute Enamel collection turns to Japanese artist Katsushika Hokusai for four limited editions, Jaeger-LeCoultre said. Each caseback is hand painted in miniature enamel, a process that takes about 80 hours and requires up to 14 layers of enamel fired at high temperatures.
Each painted scene spans roughly two square centimeters and reproduces lines and inscriptions at a scale that tests the limits of enamel micro painting. The dials pair engraved textures and grand feu enamel tones such as wheat, fishbone, or bamboo patterns, so the front and back form a crafted dialogue.
Jaeger-LeCoultre said these pieces are meant to show the intersection of watchmaking craft and visual art, with each finished watch combining mechanical refinement and applied decorative technique.
Pricing and exact production numbers for the Master Control Chronometre references and the Reverso Tribute Enamel pieces were not released at the show, the brand said. Dealers will provide availability details in the coming months.
