A. Lange & Söhne Unveils the LANGE 1 Tourbillon Perpetual Calendar “Lumen”

A radiant fusion of traditional watchmaking and contemporary luminous design

The latest release from A. Lange & Söhne, the LANGE 1 Tourbillon Perpetual Calendar “Lumen”, stands as a remarkable demonstration of haute horlogerie, combining two of watchmaking’s most prestigious complications into one striking timepiece. Officially introduced at Watches & Wonders 2026, this limited-edition model redefines both functionality and visual elegance with its luminous architecture and unmistakable LANGE 1 design.

A Signature Design Enhanced with Grand Complications

At first glance, the watch preserves the iconic off-centre dial layout that defines the LANGE 1 collection, yet beneath this familiar aesthetic lies extraordinary mechanical complexity. The integration of a tourbillon with stop seconds and a perpetual calendar elevates this timepiece into the realm of elite complications.

The dial follows a precise geometric harmony, with displays arranged in a triangular configuration connecting the outsize date, retrograde day-of-week, subsidiary seconds, and moon-phase display. Unlike traditional perpetual calendars, the months are displayed via a rotating peripheral ring, while the leap-year indicator is subtly positioned at 6 o’clock.

All calendar indications switch instantaneously, ensuring absolute clarity and precision. Impressively, the calendar will require manual correction only in the year 2100, highlighting the long-term engineering excellence behind this creation.

Luminous Innovation: Legibility in Every Condition

One of the defining features of the “Lumen” series is its ability to glow in the dark, and this model takes that concept to a new level. Every display on the LANGE 1 Tourbillon Perpetual Calendar “Lumen” is luminous, offering exceptional readability regardless of lighting conditions.

The semi-transparent dial plays a crucial role, allowing UV light to charge the luminous elements beneath it. The result is a captivating interplay of light, where larger luminous surfaces contrast with more delicate glowing details, creating a refined and sophisticated nighttime aesthetic.

A standout feature is the luminous outsize date, which reveals its intricate mechanism even in darkness. Additionally, the watch introduces a luminous moon-phase display with an integrated day/night indicator. This celestial complication features a rotating disc that depicts a bright sky during the day and a star-filled night sky after dark, with remarkable accuracy deviating by just one day over 122.6 years.

Transparency and Craftsmanship on Full Display

The semi-transparent dial not only enhances luminescence but also reveals the extraordinary craftsmanship of the movement beneath. Through both the dial and sapphire caseback, the intricate finishing techniques become visible, including perlage on the plates, solarisation on the bridges, and circular graining on the wheels.

Every component reflects the brand’s commitment to artisanal excellence, with chamfered edges and meticulously decorated surfaces creating a visual depth that is as impressive as the mechanical complexity itself.

The Tourbillon: Precision Beyond Expectations

Hidden discreetly from the dial side, the tourbillon reveals itself through the sapphire caseback, showcasing one of watchmaking’s most celebrated mechanisms. Rotating once per minute, it compensates for gravitational errors, ensuring superior accuracy.

The inclusion of a stop-seconds mechanism allows the wearer to halt the tourbillon cage instantly, enabling precise time-setting down to the second. This patented innovation demonstrates A. Lange & Söhne’s continuous pursuit of technical advancement.

Calibre L225.1: Engineering Excellence

At the heart of the watch lies the newly developed manufacture calibre L225.1, a self-winding movement composed of 685 individual parts. This highly complex calibre integrates the tourbillon, perpetual calendar, and moon-phase display while maintaining exceptional reliability and performance.

The movement features a central rotor crafted from 18-carat white gold, paired with a platinum centrifugal mass for efficient winding. It delivers a power reserve of up to 50 hours, ensuring consistent performance.

Hand-finishing reaches its peak in components such as the tourbillon cage and cocks, which are treated with black polishing – one of the most demanding finishing techniques in horology. Hand-engraved stars and decorative elements further enhance the visual identity of the movement, reinforcing its exclusivity.

Materials, Dimensions, and Exclusivity

Encased in 950 platinum, the watch measures 41.9 mm in diameter and 13.0 mm in thickness, striking a perfect balance between presence and wearability. It is paired with a black hand-stitched alligator leather strap and a platinum deployant buckle.

Limited to just 50 pieces worldwide, the LANGE 1 Tourbillon Perpetual Calendar “Lumen” is not only a technical masterpiece but also a highly exclusive collector’s item. Its debut at Watches and Wonders 2026 further solidifies its position as one of the standout releases of the year.

Technical Specifications

A New Benchmark in Haute Horlogerie

With the LANGE 1 Tourbillon Perpetual Calendar “Lumen”, A. Lange & Söhne has once again demonstrated its ability to merge tradition with innovation. By combining complex mechanical engineering with groundbreaking luminous design, the brand has created a timepiece that is both technically superior and visually captivating.

Unveiled at Watches and Wonders 2026, this limited edition not only celebrates the art of watchmaking but also pushes its boundaries, offering a glimpse into the future of high-end horology.

For more information, please visit the official A. Lange & Söhne website.

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