A. Lange & Söhne has brought one of its most technically layered Lange 1 models into the Lumen family, and the result is exactly the kind of watch that rewards a slower look.
Unveiled at Watches and Wonders 2026, the Lange 1 Tourbillon Perpetual Calendar “Lumen” combines a tourbillon with stop seconds, a perpetual calendar and the brand’s distinctive semi-transparent luminous display language.
It’s a serious piece of Glashütte watchmaking, but what makes it interesting is how much of that complexity is allowed to show.
At a glance
- A. Lange & Söhne has introduced the Lange 1 Tourbillon Perpetual Calendar “Lumen” at Watches and Wonders 2026.
- The watch pairs a stop-seconds tourbillon and perpetual calendar with a semi-transparent dark sapphire dial that glows in low light.
- It is the seventh “Lumen” reference and adds a new automatic manufacture calibre, the L225.1, to the Lange 1 story.
A Lange 1 made to work after dark
The Lumen concept is not simply a matter of adding luminous paint to hands and markers.
In A. Lange & Söhne’s vocabulary, it means using transparency and contrast as functional design tools, with a dark sapphire dial that lets ultraviolet light reach the luminous components beneath the surface.
That construction allows the displays to charge through the dial and emit a vivid green glow when light drops, while still revealing parts of the mechanical architecture normally hidden from view.
On this model, that visual effect lands on a dial already carrying a heavy horological workload.
The familiar Lange 1 ingredients remain in place, including the outsize date, the off-centre hours and minutes, and the subsidiary seconds display.
Here, the outsize date sits at 10:30, while the time display occupies a separate dial close to the crown.
That asymmetry has always been part of the Lange 1’s strength, and the Lumen treatment sharpens the contrast rather than disturbing the layout.
The perpetual calendar and tourbillon sit behind the spectacle
The headline pairing is a perpetual calendar and a tourbillon with stop seconds, two complications that ask very different things of a watchmaker.
A perpetual calendar is about long-term mechanical logic, automatically accounting for varying month lengths and leap-year cycles.
A tourbillon is about regulating performance through a rotating escapement assembly, with Lange’s stop-seconds system adding the practical ability to halt the tourbillon for precise setting.
Bringing both into a Lange 1 dial without making the watch feel like an instrument panel is the real design challenge.
The Lumen approach helps because the display gains depth rather than clutter, letting the wearer read the indications while also seeing hints of the machinery underneath.
Powering the watch is the automatic manufacture calibre L225.1, described by the brand as a new movement rather than a lightly adapted existing engine.
That matters in a watch this complex, because the dial architecture, calendar displays, luminous construction and tourbillon mechanism all have to be considered as one system.
How it fits into the Lange 1 family
The Lange 1 has carried an unusual amount of responsibility since its debut in 1994.
It arrived after Walter Lange revived the family company in Glashütte, following the fall of the Berlin Wall, and quickly became the face of the modern manufacture.
Its off-centre dial, outsize date and disciplined proportions gave A. Lange & Söhne a design identity that didn’t rely on nostalgia alone.
Over time, that architecture has proved flexible without losing its character.
The family has since grown to include models such as the Little Lange 1, Grand Lange 1, Lange 1 Moon Phase, Lange 1 Daymatic, Lange 1 Time Zone and Lange 1 Perpetual Calendar.
The Tourbillon Perpetual Calendar chapter began in 2012 with a platinum reference fitted with the automatic calibre L082.1 and produced in 100 pieces.
That model established how far the Lange 1 format could be pushed while retaining its signature balance.
The new Lumen version takes that idea in a more architectural direction, using the dial itself as a window into the complication rather than treating the display as a closed surface.
Details & Specifications
| Brand | A. Lange & Söhne |
|---|---|
| Model | Lange 1 Tourbillon Perpetual Calendar “Lumen” |
| Collection | Lange 1 |
| Debut | Watches and Wonders 2026 |
| Movement | Automatic manufacture calibre L225.1 |
| Complications | Tourbillon with stop seconds, perpetual calendar |
| Dial | Semi-transparent dark sapphire with luminous elements |
| Key displays | Outsize date, off-centre hours and minutes, subsidiary seconds |
| Series context | Seventh “Lumen” reference |
The Lange 1 Tourbillon Perpetual Calendar “Lumen” is likely to appeal most to collectors who already understand the quiet discipline of Lange design but want the mechanics brought closer to the surface.
It’s not a watch that needs theatrical proportions to make its point, because the drama is built into the way light, shadow and high complication meet on the dial.
