A. Lange & Söhne has always treated the Lange 1's asymmetric dial architecture as a canvas for complication. The "Lumen" edition pushes that proposition further than any previous iteration: a tourbillon, a perpetual calendar, and a moon phase—all luminous, all readable in complete darkness, housed in a 950 platinum case limited to 50 pieces.
Things to Know About the Watch
The dial is sapphire crystal, coated to allow UV light to continuously charge the luminous compound beneath — a constructive necessity that also makes the movement visible. The result is a watch that reads differently by day and by night, with larger elements like the outsize date and leap-year display glowing more intensely than the finer hands and scales, creating a hierarchy of light rather than a uniform wash. The peripheral month ring replaces the conventional aperture display, and all calendar indications switch instantaneously.
Barring interruption, the calendar requires no manual correction until 1 March 2100. The moon-phase display debuts an integrated day/night indication: a celestial disc rotating once per 24 hours shows a star-filled sky after dark and a clear sky during daylight. Accuracy is one day's deviation per 122.6 years. The 41.9mm platinum case contrasts sharply against the dark dial and black hand-stitched alligator strap with platinum deployant buckle.
The Movement
Calibre L225.1 spans 685 components across 34.1mm and 8.3mm of height — numbers that convey the density of what Lange has packed in. The self-winding rotor uses an 18-carat white gold central segment in black rhodium for the first time, with a 950 platinum centrifugal mass delivering 50 hours of power reserve. The tourbillon cage, cock, and intermediate-wheel cock are finished in black polish and hand-engraved with stars and a shooting star. A diamond endstone secured by a screwed gold chaton sits at the tourbillon's center. The stop-seconds mechanism, protected by a 2008 Lange patent, allows one-second setting accuracy.
Summary & Price
The Lange 1 Tourbillon Perpetual Calendar "Lumen" is among the most technically and aesthetically considered pieces at Watches and Wonders Geneva 2026 — fifty watches that function as both grand complication and nocturnal light show. This watch is limited to 50 pieces.
Sticker Price Upon Request. For more info on A. Lange & Söhne, click here.
