A. Lange & Söhne Unveils Lange 1 Tourbillon Perpetual Calendar "Lumen"

A. Lange & Söhne Lange 1 Tourbillon Perpetual Calendar "Lumen"

At Watches and Wonders 2026, A. Lange & Söhne unveils the Lange 1 Tourbillon Perpetual Calendar “Lumen,” a highly complex limited edition that combines two of haute horlogerie’s most revered complications— tourbillon and perpetual calendar— within the unmistakable architecture of the Lange 1 and equipped with some of the brand's sophisticated developments. Distinguished by its semi-transparent dial and fully luminescent displays, the watch extends the manufacture’s “Lumen” concept into new technical territory.

The Lange 1’s hallmark off-center dial layout remains intact, yet is elevated through the integration of a tourbillon with stop seconds and a perpetual calendar featuring a peripheral month ring and instantaneous switching indications. The displays are arranged in a harmonious geometric composition in the form of an isosceles triangle: an imaginary vertical line connects the outsize date, retrograde day-of-week display as well as the seconds hand and the moon-phase indication; the look is anchored by the outsize date, retrograde day-of-week display, subsidiary seconds, and moon-phase indicator. The center of the hour and minute display marks the tip of the triangle. Unlike most perpetual calendars, the months are shown on a rotating circumferential ring, while the leap-year indication is discreetly positioned at 6 o’clock. All calendar displays advance instantaneously, ensuring absolute clarity and legibility at all times. When kept running continuously, the mechanism will require manual correction only on March 1, 2100.

The defining feature of this “Lumen” model lies in its exceptional nighttime legibility. Thanks to a sophisticated sapphire-crystal dial construction, UV light penetrates the surface to charge the luminous compound beneath. The result is a fully illuminated display that brings the technical complexity to life at night. The meticulously orchestrated interplay of larger and more filigreed surfaces, based on innovative, complex dial architecture, creates an elegant, nuanced ambience of light. The signature outsize date glows prominently in the dark, revealing its underlying mechanism consisting of a tens cross and a units disc. 

Equally noteworthy is the luminous moon-phase display with integrated day/night indication, a first. A celestial disc that rotates clockwise once during 24 hours forms the backdrop for the lunar orbit. During the day, a light sky without stars can be perceived, while at night, a dark sky studded with a multitude of luminous stars are shown. In front of the celestial disc, the precise waxing and waning of the earth’s satellite can be observed while it slowly traverses the sky. The moon-phase remains accurate to within one day over 122.6 years. The leap-year display at 6 o’clock is also coated with a luminous compound, resulting in the same pronounced two-dimensional intensity of the outsize date. The hands indicating the hours, minutes, seconds and day of the week, as well as all scales, appliques and contours of the moon, are significantly more delicate in terms of their luminescence.

Thanks to the semi-transparent dial, the movement— and its intricate calendar mechanism— remains clearly visible, inviting a closer look at the many finely finished components. Large plates adorned with perlage, bridges with delicate solarization, levers with straight graining, and wheels with circular graining all reveal themselves in detail. Combined with carefully chamfered edges, these elements reflect the exceptional level of artisanal finishing. Subtle contrasts in the materials and their hues add further visual depth and refinement.

On the dial side, only a discreet inscription at 12 o’clock hints at the presence of a grand complication within the watch, the tourbillon. Its full technical beauty is revealed only through the exhibition case back, where the intricate mechanism can be admired in motion. Once per minute, the delicate cage rotates on its axis, counteracting the effects of gravity on the balance, which is fitted with eccentric poising weights. Paired with an in-house balance spring, it ensures exceptional precision, beating at a frequency of 21,600 semi-oscillations per hour. The integrated stop-seconds mechanism allows the balance inside the tourbillon cage to be halted instantly by pulling the crown. This enables precise setting to the exact second— a very feature for a tourbillon— made possible by a sophisticated V-shaped arresting spring, patented by the manufacture in 2008. 

For the first time, a central rotor in 18-carat white gold bears the A. Lange & Söhne signature, ensuring efficient winding. Its peripheral mass in 950 platinum adds momentum, allowing the watch to quickly build up a maximum power reserve of 50 hours. The rotor itself continues the theme of contrast, combining a dark, black-rhodiumed central segment with the lighter tone of the platinum mass.

The watch’s artisanal refinement is particularly evident in the tourbillon cage, as well as in the tourbillon cock and intermediate-wheel cock. Crafted from stainless steel, these components are finished using one of watchmaking’s most demanding techniques: black polish. This meticulous process involves carefully moving the part by hand across a tin plate with fine abrasive paste until the surface achieves a mirror-like reflection at a certain angle, while appearing with a jet-black sheen black from others. All edges are chamfered and polished, with internal angles— among the most difficult details to execute— requiring exceptional precision and a steady hand. Further decorative highlights include hand-engraved stars and a shooting star on the tourbillon and intermediate-wheel cocks. Carefully polished, these motifs stand out against their matte surroundings, creating a striking visual interplay. At the center of the tourbillon, a diamond endstone set in a screwed gold chaton provides a final focal point, serving as an homage to a traditional feature once reserved for the finest 1A-quality pocket watches.

Measuring 41.9mm in diameter and 13.0mm in height, the Lange 1 Tourbillon Perpetual Calendar “Lumen" is paired with a black alligator leather strap. The model is issued in a strictly limited edition of 50 pieces. Pricing is available upon request.

A. Lange & Söhne Saxonia Annual Calendar

Not as complex as the Lange 1 Tourbillon Perpetual Calendar “Lumen,"  but still a highly sophisticated take on the calendar watch, the new generation of the Saxonia Annual Calendar showcases A. Lange & Söhne’s talent for combining technical finesse with understated elegance. Also introduced at Watches and Wonders 2026, the model features a new self-winding manufacture caliber housed in a compact, classically proportioned case available in white or pink gold, combined with an argenté respectively gray dial. The annual calendar mechanism automatically advances at the end of each month, correctly accounting for months with 30 and 31 days. It requires adjustment only once per year, at the end of February, or on February 29 in a leap year. Ease of use is a key focus: all indications, including the moon-phase, can be corrected individually or advanced together via a pusher at 10 o’clock.

Designed with clarity in mind, the dial places time and date front and center, complemented by a day display at 9 o’clock, a month indication opposite, and a subsidiary seconds dial at 6 o’clock with an integrated moon-phase. The latter is accurate to one day in 122.6 years and features a deep-blue disc with 428 stars, evoking a miniature night sky.

Despite the wealth of information, the Saxonia Annual Calendar maintains a lucid, balanced aesthetic. Slender baton appliques, lancet-shaped hands, and a fine minute scale lend the dial its refined character. The carefully composed layout integrates slightly recessed subdials with contrasting azurage finishes, enhancing depth and legibility while maintaining visual harmony. Subtle design refinements, such as newly shaped appliques with a gently faceted, pyramid-like profile, add further sophistication.

Powering the watch is the new caliber L207.1 with a 60-hour power reserve, visible through the sapphire case back and finished to the brand’s exacting standards, including a hand-engraved balance cock and traditional screwed gold chatons. Measuring 36.0mm in diameter and 9.8 mm in height, the watch offers elegant proportions. It is paired with a hand-stitched alligator leather strap. Pricing is available on request.

To learn more, visit A. Lange & Söhne, here.