Darkness has never looked so good. Just a day after exploring how IWC transformed the Big Pilot’s Watch into a 24-hour night-time spectacle, another remarkable timepiece has arrived to remind us that the most captivating watches often reveal their true character after the lights go out. This time, it’s A. Lange & Söhne is taking centre stage with the new Lange 1 Tourbillon Perpetual Calendar “Lumen”—a watch that turns darkness into part of the experience rather than something to overcome. Limited to just 50 platinum pieces, it’s the first time the Lange 1 Tourbillon Perpetual Calendar has received the celebrated “Lumen” treatment, making it one of the standout releases from Watches and Wonders 2026.
While the IWC Big Pilot’s Watch Perpetual Calendar Ceralume uses an entirely luminous ceramic case to steal the show, A. Lange & Söhne takes a far more complex approach. The Glashütte German manufacture engineering does the talking, with a semi-transparent sapphire dial that quietly reveals its magic once darkness falls. It’s a completely different interpretation of luminescence, yet one that makes every bit of this fascinating.
The new Lange 1 Tourbillon Perpetual Calendar “Lumen” is joined by the elegant Saxonia Annual Calendar, continuing A. Lange & Söhne’s tradition of combining exceptional mechanical complexity with understated German craftsmanship. Together, they show why the manufacture remains one of the most respected names in haute horlogerie. Now, let’s take a closer look at the remarkable watch that’s bringing a whole new light to the iconic Lange 1 collection.
The beauty of the Lange 1 Tourbillon Perpetual Calendar “Lumen” isn’t tied to a single display. The longer you spend with the dial, the more there is to appreciate. The maison’s signature outsize date continues to anchor the upper-left corner, while the leap-year display at 6 o’clock glows with a vivid green intensity that immediately draws your eye. Around them, the hands, scales, appliqués and the delicate contours surrounding the moon-phase display emit a softer glow, giving the dial depth without overpowering its clean, balanced layout.
Just beneath the maison’s signature outsize date sits one of the watch’s most fascinating additions. Making its first appearance in the Lange 1, the luminous moon-phase display now incorporates an integrated day-and-night indication. A celestial disc rotates clockwise once every 24 hours, shifting from a bright daytime sky to a dark sky scattered with luminous stars as evening arrives. It’s an elegant detail that quietly changes the character of the dial throughout the day, yet it’s every bit as precise as it is beautiful, requiring a correction of just one day after 122.6 years.
The front of the Lange 1 Tourbillon Perpetual Calendar “Lumen” may steal the spotlight, but the reverse is just as rewarding. Turn the watch over, and a sapphire crystal caseback reveals the newly developed Calibre L225.1, where every bridge, edge and component has been finished entirely by hand. From the traditional German silver plates and hand-engraved balance cock to the polished steel parts and gold chatons, it’s the kind of craftsmanship that encourages you to spend as much time admiring the movement as the dial itself.
Surrounding the movement is a beautifully finished 950 platinum case, measuring 41.9 mm in diameter and 13 mm thick. The cool tone of the platinum creates a striking contrast against the dark semi-transparent dial, while its reassuring weight gives the watch an unmistakable sense of substance on the wrist. Limited to just 50 pieces, the precious metal feels like the perfect choice for one of the most technically accomplished Lange watches ever produced.
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Powering the watch is the self-winding Manufacture Calibre L225.1, the 77th movement developed by A. Lange & Söhne since the manufacture’s rebirth in 1990. It features an 18-carat white gold central rotor fitted with a 950 platinum peripheral mass, combining efficient winding with beautifully balanced aesthetics. Once fully wound, the movement delivers a 50-hour power reserve and beats at 21,600 vibrations per hour (3 Hz), bringing together a tourbillon, perpetual calendar, moon-phase display and the maison’s signature outsize date within a single calibre.
Despite its highly complicated movement, the Lange 1 Tourbillon Perpetual Calendar “Lumen” remains practical enough for everyday wear. It offers 3 bar (30 metres) of water resistance and is paired with a black alligator leather strap secured by a 950 platinum deployant buckle. It’s not a watch designed for adventure in the traditional sense, but one created to be appreciated every time it’s worn—whether you’re admiring the glowing dial after sunset or the extraordinary movement through the sapphire caseback.
The Lange 1 Tourbillon Perpetual Calendar “Lumen” feels like one of those watches that only A. Lange & Söhne could create. It combines some of the manufacture’s most celebrated complications with the unmistakable character of the “Lumen” series, yet never loses the quiet elegance that has defined the Lange 1 for more than three decades.
Limited to just 50 pieces in 950 platinum and priced at €550,000, this watch is one that very few collectors will ever have the opportunity to own. Even so, it represents far more than an exclusive limited edition. It reflects everything that makes A. Lange & Söhne so highly regarded—patient craftsmanship, mechanical excellence and an attention to detail that reveals itself over time.
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- Brand: A. Lange & Söhne
- Model: Lange 1 Tourbillion Perpetual Calendar ‘Lumen’
- Reference: 720.035FE / LSLS7202AG
- Diameter: 41.9 mm
- Thickness: 13 mm
- Material: Platinum
- Strap: Black Alligator Leather
- Dial: Black
- Calibre: Self-Winding L225.1
- Power Reserve: 50 Hours
- Water-Resistance: 3 Bar (30 metres, 100 feet)
- Price: EUR €550,000 (Limited Edition – 50 Pieces)
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