Jaeger-LeCoultre Master Control Chronometre Date. Ref. Q4158120, Master Control Chronometre Date Power Reserve Ref. Q4168120, and Perpetual Calendar Ref. Q417216J
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Jaeger-LeCoultre Launches the Master Control Chronomètre With a Serious Precision Upgrade

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Precision has never exactly been a new obsession for Jaeger-LeCoultre. Back in 1992, the Swiss maison introduced its now-famous 1,000 Hours Control testing programme, putting fully cased watches through an extensive series of checks before they could leave the manufacture. More than three decades later, Jaeger-LeCoultre has decided that 1,000 hours alone isn’t quite enough to make its point.

At Watches and Wonders 2026, the manufacture unveiled the new Master Control Chronomètre collection, a three-watch family built around a much stricter approach to precision. The lineup includes the Master Control Chronomètre Date, Date Power Reserve and Perpetual Calendar, all presented with a newly integrated metal bracelet and a cleaner, more contemporary take on the familiar Master Control design.

The bigger story, however, sits behind the dial. Jaeger-LeCoultre has introduced its new High Precision Guarantee, or HPG, alongside the collection, with every Master Control Chronomètre also carrying COSC certification. In other words, one precision test apparently wasn’t enough for the watchmaker from the Vallée de Joux. So, what exactly does Jaeger-LeCoultre’s new precision standard involve, and what makes these three Master Control Chronomètre watches different? Let’s take a closer look at the collection and the serious precision upgrade happening inside.

Jaeger-LeCoultre Master Control Chronometre Date | Image: Jaeger-LeCoultre

Jaeger-LeCoultre Master Control Chronometre Date

If there is a watch in the new collection that gets straight to the point, it’s the Master Control Chronomètre Date. Jaeger-LeCoultre has kept the formula refreshingly simple here, pairing hours, minutes and seconds with a discreet date window at 3 o’clock. The case measures a compact 38mm across and just 8.4mm thick, giving the watch the kind of slim proportions that should slip under a cuff without much thought, while 50 metres of water resistance keeps things practical for everyday wear.

The stainless-steel model comes with a blue-grey gradient sunray-brushed dial, polished rhodium-finished hour markers and slim Dauphine hands, while the precision seconds and minutes track around the edge adds a slightly more technical touch. The 18K pink-gold version turns up the warmth with a bronze-coloured, toffee-brown sunray dial and a matching precious-metal bracelet. Both feel unmistakably Master Control, but the integrated bracelet gives the collection a noticeably more modern character than the leather-strapped models many of us associate with the name.

Inside is the automatic Jaeger-LeCoultre Calibre 899, beating at 28,800 vibrations per hour (4 Hz) and delivering a healthy 70-hour power reserve. The movement is COSC-certified, but Jaeger-LeCoultre doesn’t stop there. Each watch also carries the maison’s new High Precision Guarantee Seal, which tests the complete cased watch under conditions designed to better reflect real-world wear, including changes in position, temperature, altitude and shocks.

For us, the steel version is probably the easiest place to start with the new Master Control Chronomètre family. The blue-grey dial has just enough colour to keep things interesting, the 38mm case feels beautifully restrained, and the integrated bracelet adds a sportier edge without suddenly making the Master Control loud. The pink-gold model is naturally the more extravagant choice, but either way, this is Jaeger-LeCoultre showing that a serious precision upgrade doesn’t need to arrive wrapped in an overly complicated watch.

Jaeger-LeCoultre Master Control Chronometre Date Ref. Q4158120
Jaeger-LeCoultre Master Control Chronometre Date Ref. Q4158120 | Image: Jaeger-LeCoultre
  • Brand: Jaeger-LeCoultre
  • Model: Master Control Chronometre Date
  • Reference: Q4158120
  • Diameter: 38 mm
  • Thickness: 8.4 mm
  • Material: Stainless Steel
  • Dial: Blue – Sunray-Brushed
  • Calibre: Calibre 899
  • Power Reserve: 70 Hours
  • Water-Resistance: 5 Bar (50 metres, 165 feet)
  • Price: USD $14,200
Jaeger-LeCoultre Master Control Chronometre Date Ref. Q415216J | Image: Jaeger-LeCoultre
  • Brand: Jaeger-LeCoultre
  • Model: Master Control Chronometre Date
  • Reference: Q415216J
  • Diameter: 38 mm
  • Thickness: 8.4 mm
  • Material: Pink Gold
  • Dial: Toffee Brown
  • Calibre: Calibre 899
  • Power Reserve: 70 Hours
  • Water-Resistance: 5 Bar (50 metres, 165 feet)
  • Price: USD $52,500
Jaeger-LeCoultre Master Control Chronometre Date Power Reserve | Image: Jaeger-LeCoultre

Jaeger-LeCoultre Master Control Chronometre Date Power Reserve

Things get a little busier with the Master Control Chronomètre Date Power Reserve, although Jaeger-LeCoultre has kept the dial beautifully balanced. Housed in a 39mm stainless-steel case measuring 9.2mm thick, the watch takes inspiration from the maison’s 1951 Futurematic, arranging two symmetrical sub-dials across its blue-grey gradient sunray-brushed dial. One keeps track of the date, complete with a red “31” for the longest months, while the other displays the remaining power reserve and introduces a red warning section as the movement begins to run low.

Behind the display is the new automatic Calibre 738, an in-house movement developed around this combination of date and power reserve functions. It beats at 4 Hz and delivers 70 hours of power reserve, while the new integrated three-row stainless-steel bracelet brings the same mix of brushed and polished finishing seen across the wider Master Control Chronomètre family. Like the rest of the collection, precision is backed by both COSC certification and Jaeger-LeCoultre’s new HPG Seal, meaning the complete cased watch faces further testing under real-life wear conditions.

Jaeger-LeCoultre Master Control Chronometre Date Power Reserve Ref. Q4168120 | Image: Jaeger-LeCoultre
  • Brand: Jaeger-LeCoultre
  • Model: Master Control Chronometre Date Power Reserve
  • Reference: Q4168120
  • Diameter: 39 mm
  • Thickness: 9.2 mm
  • Material: Stainless steel
  • Dial: Blue – Sunray-Brushed
  • Calibre: Calibre  738
  • Power Reserve: 70 Hours
  • Water-Resistance: 5 Bar (50 metres, 165 feet)
  • Price: USD $17,000
Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar | Image: Jaeger-LeCoultre

Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar

Saving the most complicated for last, the Master Control Chronomètre Perpetual Calendar packs an impressive amount of information into a 39mm case measuring just 9.2mm thick. Four counters take care of the calendar display, showing the day, date, month, year and moon phase, yet the dial remains surprisingly easy to read considering how much is going on. The steel model pairs a blue-grey sunray dial with a hammered platinum moon, while the 18K pink-gold version warms things up with a bronze-coloured dial and hammered gold-leaf moon.

Powering everything is Jaeger-LeCoultre’s in-house Calibre 868, an automatic movement measuring only 4.72mm thick and beating at 4 Hz. Despite its slim construction, the calibre delivers a healthy 70-hour power reserve, a considerable improvement over earlier generations of the movement. As long as the watch remains wound, the perpetual calendar automatically accounts for months of different lengths and leap years, meaning you shouldn’t need to manually correct the calendar until 2100.

Jaeger-LeCoultre has also kept adjustment refreshingly simple for a watch this complicated, with the calendar indications synchronized so they can be corrected together. The new integrated three-row bracelet gives the Perpetual Calendar a noticeably different personality from the more traditional leather-strapped perpetual calendars we usually associate with the maison, blending polished and satin-brushed surfaces with the slimmer case proportions. Like the rest of the Master Control Chronomètre collection, it is backed by both COSC certification and Jaeger-LeCoultre’s High Precision Guarantee.

For us, this is probably the watch that best shows what the new Master Control Chronomètre collection is trying to achieve. A perpetual calendar is already one of watchmaking’s great complications, but fitting one into a 9.2mm-thick case, adding an integrated bracelet, and holding it to a stricter precision standard give the watch a very different character. The steel version, with its blue-grey dial and hammered platinum moon, would be our pick, as it suits everyday wear, although we’d happily wait until 2100 to find a reason to complain about either.

Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar Ref.Q4178180
Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar Ref.Q4178180 | Image: Jaeger-LeCoultre
  • Brand: Jaeger-LeCoultre
  • Model: Master Control Chronometre Perpetual Calendar
  • Reference: Q4178180
  • Diameter: 39 mm
  • Thickness: 9.2 mm
  • Material: Stainless steel
  • Dial: Blue – Sunray-Brushed
  • Calibre: Calibre  868
  • Power Reserve: 70 Hours
  • Water-Resistance: 5 Bar (50 metres, 165 feet)
  • Price: USD $45,700
Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar Ref. Q417216J
Jaeger-LeCoultre Master Control Chronometre Perpetual Calendar Ref. Q417216J | Image: Jaeger-LeCoultre
  • Brand: Jaeger-LeCoultre
  • Model: Master Control Chronometre Perpetual Calendar
  • Reference: Q417216J
  • Diameter: 39 mm
  • Thickness: 9.2 mm
  • Material: Pink Gold
  • Dial: Toffee brown
  • Calibre: Calibre  868
  • Power Reserve: 70 Hours
  • Water-Resistance: 5 Bar (50 metres, 165 feet)
  • Price: USD $83,500

What Do We Think About the New Master Control Chronomètre?

The Master Control Chronomètre collection represents a considered evolution of one of Jaeger-LeCoultre’s most established families. Rather than relying on dramatic design changes, the manufacturer has focused on precision, proportions and everyday wearability, introducing slimmer cases and integrated metal bracelets while retaining the restrained character long associated with Master Control. Across the collection, the Date, Date Power Reserve and Perpetual Calendar each offer a different level of complexity within a clear and consistent design language.

More importantly, the new High Precision Guarantee gives the collection a real reason to carry the Chronomètre name. Jaeger-LeCoultre isn’t only testing a movement under controlled conditions; the complete watch is subjected to changes in position, pressure, and temperature, along with shocks designed to mimic what it may face on the wrist. Combined with COSC certification, this approach suggests Jaeger-LeCoultre is simply holding itself to a higher standard — and for a manufacturer that has spent decades chasing better precision, that seems like the right way to move forward.

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Mercedes-AMG Drops the GT XX Concept with 1,000 kW Power and Lightning-Fast Charging

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  • Three axial-flux electric motors produce over 1,000 kW (>1,360 hp), delivering hypercar-level performance in the GT XX.
  • Built on AMG’s new AMG.EA 800-volt platform, capable of adding approximately 400 km of WLTP-estimated range in about five minutes.
  • Ultra-aerodynamic design with an impressive 0.198 Cd, featuring active aero, a low-profile stance, and the bold 10-slat AMG-specific grille.
  • Innovative 21-inch active Aero Wheels employ self-powered actuators and movable aero blades to optimise cooling and efficiency.
  • The concept previews AMG’s first high-performance EV model and positions the brand as a rival to cars like the Porsche Taycan and Xiaomi SU7.

Electric performance cars often make bold promises, but the Mercedes-AMG Concept AMG GT XX arrives with a confidence that suggests AMG is already thinking several steps ahead. Even before considering the power figures, the design alone indicates this isn’t a subtle introduction to the EV world — it’s a statement piece. The long, stretched silhouette, dramatic fenders, and Sunset Beam Orange paint with its liquid-metal Electroluminescent effect immediately set it apart. While the styling has received mixed reactions online, everything about its shape is purposeful rather than vanity. At 0.198 Cd, the GT XX is one of the most aerodynamic performance concepts ever revealed, achieved through a bold combination of low-slung surfaces, active aero management, and that polarising AMG-specific grille with 10 vertical slats.

Only after you absorb the exterior drama do the technical details hit you — and they hit hard. AMG has packed three axial-flux electric motors into the GT XX, two mounted at the rear and one at the front, producing over 1,000 kW of combined power. It’s a layout engineered for impressive figures, but the real magic lies deeper in the car: the brand-new AMG.EA 800-volt platform. Designed to push EV performance far beyond what we’ve seen from Mercedes-AMG so far, the system theoretically allows for an eye-opening 400 km of WLTP range with roughly five minutes of charging. It’s outrageous on paper, but that’s exactly what concept cars are meant to do — provide a glimpse of what happens when engineers are unrestrained.

Concept AMG GT XX Specifications

CONCEPT AMG GT XX
Length / Width / Height (mm)5,204 / 1,945 (2,130 incl. mirrors) / 1,317
Electric MotorsThree axial flux motors
Max. Drivetrain Power>1,000 kW (>1,360 hp)
Drive SystemAMG Performance 4MATIC+ fully variable AWD
Top Speed>360 km/h
Charging Time ( ~ 400 km WLTP)~5 minutes
Average DC Charging Power>850 kW over a wide SOC range
Nominal Voltage>800 V
Drag Coefficient (Cd)0.198
Frontal Area2.24 m²
CONCEPT AMG GT XX | Image: Mercedes-AMG

How Powerful Is the Concept AMG GT XX?

Now you’re wondering what these high-tech axial flux motors that Markus Schäfer mentioned powering this Concept AMG GT XX are. Well, this is where things get interesting. Mercedes-AMG didn’t settle for a typical dual-motor setup; instead, they went all out with three axial flux motors—two located at the back for maximum power and one up front to keep everything glued to the road. Together, they deliver more than 1000 kW of power, or over 1,360 horsepower, with a top speed of 360 km/h (224 mph). Pretty impressive, right?

Here’s a clearer overview:

  • Motors: Three axial flux electric motors (two rear, one front)
  • Peak Power: >1,000 kW (>1,360 hp)
  • Top Speed: >360 km/h
  • Drive System: AMG Performance 4MATIC+ fully variable all-wheel drive
  • Acceleration: Not officially quoted, but expected to be hypercar quick

Now, the motors are impressive, but the battery behind them is where things get seriously nerdy—in the best way. AMG developed a High Performance Electric Battery (HP.EB) built around 3,000 cylindrical NCMA cathode and silicon-rich anode cells, all packed into a laser-welded aluminium casing designed for stronger thermal and electrical flow. You don’t need to memorise the chemistry; just know this is top-tier, next-generation tech designed to squeeze out every watt of performance.

Pair that with the AMG.EA 800-volt architecture, and suddenly the GT XX begins to feel like it’s plugged into the future. With access to the right charger, it can draw up to 850 kW—enough to add about 400 km of WLTP-estimated range in under five minutes. That’s not just fast charging or, as I like to call it, A pit-stop refuelling.

CONCEPT AMG GT XX | Image: Mercedes-AMG
CONCEPT AMG GT XX | Image: Mercedes-AMG

Of course, there’s a small catch… Only one charger on Earth can currently deliver 850 kW, a prototype co-developed by Mercedes-Benz and Alpitronic. The plan, however, is to scale this technology through the expanding Mercedes-Benz Charging Network, much like Tesla built its Supercharger empire.

Since this is a concept, most people will never get behind the wheel, but AMG still shared how it would drive. Power is delivered to the ground through a fully variable AMG Performance 4MATIC+ all-wheel-drive system, allowing the three motors to instantly shift torque between the front and rear. This is what most of us would expect to see in the next generation of AMG EVs.

And because AMG refuses to release a performance car without some attitude, the GT XX doesn’t stay silent. It pumps out a synthetic V8-inspired soundtrack—inside and outside—thanks to speakers integrated into the headlights and a clever membrane system that adds deep, punchy bass. Fake? Sure. Fun? Absolutely.

CONCEPT AMG GT XX | Image: Mercedes-AMG
CONCEPT AMG GT XX | Image: Mercedes-AMG
CONCEPT AMG GT XX | Image: Mercedes-AMG
CONCEPT AMG GT XX | Image: Mercedes-AMG

What Does the Concept AMG GT XX Look Like Inside?

Interior design in the Concept AMG GT XX heavily reflects AMG’s racing heritage while exploring new, experimental ideas. The cabin combines futuristic surfaces with raw motorsport elements, starting with LABFIBER — a biotech leather alternative made from recycled AMG GT3 racing tyres — paired with backlit upholstery shaped like a chequered flag. Exposed sections on the instrument panel and doors give everything a stripped, performance-oriented vibe, while carbon-fibre bucket seats with 3D-printed pads and machined aluminium buttons stamped with the AMG crest add a level of detail that feels both technical and artistic.

The digital side of the interior plays just as big a role. A 10.25-inch instrument display sits ahead of the driver, complemented by a 14-inch touchscreen that tilts subtly toward you, creating a cockpit-like wraparound effect. What makes this setup interesting isn’t just the hardware, but how it visualizes the powertrain. Real-time animations of the drivetrain and battery add a playful, almost video game-like quality to performance monitoring, making the tech feel alive rather than simply informative. It’s precisely the kind of detail that makes a concept car feel like a glimpse of what’s coming next.

The steering wheel is another feature worth mentioning, and AMG has always led in this area, but the GT XX pushes things even further with a rectangular racing-inspired design, a flat top and bottom, and dual horizontal struts that immediately transform the driving experience. Regen-control paddles sit behind the wheel, while AMG’s signature toggle switches line the grips with colour-coded icons. An integrated LED strip provides real-time updates on battery and performance, turning the wheel itself into a kind of live performance gauge. It’s dramatic, practical, and distinctly AMG.

CONCEPT AMG GT XX | Image: Mercedes-AMG

What’s Behind the Aerodynamic Shape of the CONCEPT AMG GT XX?

Aerodynamics are the entire reason the Concept AMG GT XX looks the way it does. Even AMG admits it isn’t aiming for classic beauty here—“Drag!” is the real reason. When a car is designed to reach 360 km/h, the biggest enemy isn’t weight or traction; it’s air resistance. So instead of going for a stylish silhouette, AMG shaped the GT XX to be as aerodynamic as possible.

The low, flat stance, sharply angled windscreen, long bonnet, and slanted side windows all work together to help the car cut through the air efficiently. Even familiar systems like the AIRPANEL active aero from the AMG GT return with new tuning, while the complete removal of a rear window helps streamline airflow off the back. All of these choices contribute to a drag coefficient of Cd = 0.198, placing the GT XX alongside aero-focused vehicles like the Xiaomi SU7 (0.195) and Lucid Air (0.197).

One of the most impressive aerodynamic features sits at each corner of the car, where AMG has installed 21-inch forged aluminium five-spoke active Aero Wheels. Each wheel conceals five adjustable aero blades operated by a small actuator tucked inside the hub. When the car requires extra brake cooling, the blades open to draw in air; when efficiency is the priority, they close to create a cleaner, more aerodynamic profile.

CONCEPT AMG GT XX | Image: Mercedes-AMG
CONCEPT AMG GT XX | Image: Mercedes-AMG

The engineering behind them is just as wild. Each actuator produces its own electricity with a mini-generator built into the spinning wheel, and all four communicate wirelessly via Bluetooth. It’s the kind of detail you’d expect to see on a high-budget sci-fi prototype, not a four-door concept car.

“With the CONCEPT AMG GT XX, we have succeeded in translating our design vision for AMG into the future,” said Michael Schiebe, CEO of Mercedes-AMG GmbH. He goes even deeper into what the car represents: “Sports cars have always been the icons of our brand; they are emotional and truly special to create. They represent unique moments in time. Icons like the 300 SL and the legendary Silver Arrows are the emotional heart of our brand, as are the GT and AMG ONE. Crafting these masterpieces is about creating something extraordinary—from the C111 to the Vision One-Eleven, and into the future of production. The brand-new CONCEPT AMG GT XX embodies the hot part of our design philosophy of sensual purity.”

With that mindset, the GT XX’s shape makes perfect sense. It’s not designed to be soft or attractive — it’s intended to look fast, feel technical, and behave like a machine built to cheat the wind. It’s AMG’s way of saying performance comes first, and everything else follows.

CONCEPT AMG GT XX | Image: Mercedes-AMG

What Comes After the CONCEPT AMG GT XX?

The Concept AMG GT XX won’t be hitting the road in its current form, but that doesn’t make it any less important. Instead, it offers a preview of the first series-production model built on AMG’s new AMG.EA high-performance architecture. It provides a glimpse into how Mercedes-AMG plans to develop its electric identity — not by softening its approach, but by doubling down on the features that made AMG renowned in the first place.

Mercedes-AMG makes it clear that this concept marks a turning point. “The CONCEPT AMG GT XX is the next milestone in the history of AMG and forges a whole new dimension of performance,” said Markus Schäfer, Member of the Board of Management of Mercedes-Benz Group AG, Chief Technology Officer, Development & Procurement. Coming from someone at the very top of the company’s engineering structure, that carries weight — and confidence.

Schäfer explains why the GT XX is so important to the brand’s electric plans. “We’re bringing groundbreaking technology that redefines high performance, and the best thing is that this car is a true AMG with every fibre of its being. The heart of an AMG was always the motor, and that will remain so with our in-house electric architecture. With our high-tech axial flux motor, we’re delivering a revolutionary new drive that is unparalleled in power density, weight, and packaging. This pairs with a new performance battery developed from scratch that enables a previously unimagined level of performance and endurance.”

When a production model inspired by the GT XX eventually arrives, it won’t just expand AMG’s EV lineup. It will give Mercedes-AMG a genuine competitor to the Porsche Taycan and a strong response to aggressive players like the Xiaomi SU7. The GT XX may be a concept car, but the message behind it is clear: the next era of AMG performance is on its way, and it will arrive with the same attitude, intensity, and ambition the brand is known for — only now delivered through electric motors instead of pistons.

CONCEPT AMG GT XX | Image: Mercedes-AMG

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