A. Lange & Söhne has used Watches and Wonders 2026 to bring its two heaviest complications under the same semi-transparent dial for the first time. The Lange 1 Tourbillon Perpetual Calendar Lumen is the brand's flagship novelty for the year, a 50-piece platinum reference that combines the tourbillon, the perpetual calendar and the Lumen treatment Lange has been refining on simpler references since 2010.
The Lumen idea, scaled up
The Lumen line, which Lange started with the Zeitwerk in 2010, has always been about charging the entire dial with luminous compound and then framing it behind a tinted sapphire layer dark enough that the watch reads black by day and glows green in the dark. The trick works because every display, including printed numerals and the date apertures, is built to fluoresce. Lange has executed Lumen versions of the Zeitwerk, Grand Lange 1, Datograph Up/Down and Saxonia, but never the Lange 1 Tourbillon Perpetual Calendar, the brand's most complex grand complication built around the Lange 1 case.
Monochrome's first look confirms the new piece retains the off-centre Lange 1 dial geometry. The main dial, the subsidiary seconds counter and the outsize date display sit at the corners of an imaginary isosceles triangle. Under the semi-transparent sapphire layer Lange has exposed the entire calibre, so you can see the perpetual calendar gear train, the month wheel, the day-of-week disc, and the four-minute tourbillon cage at 6 o'clock.
Calibre L225.1: 684 components
The Lange 1 Tourbillon Perpetual Calendar Lumen is powered by a new movement reference, the L225.1, derived from the L082.1 in the standard Lange 1 Tourbillon Perpetual Calendar but reworked so every display can be read through the sapphire dial. The calibre comprises 684 components and 74 jewels, runs at 21,600 vph, and stores 50 hours of reserve. The German Silver three-quarter plate, hand-engraved balance cock and gold chatons are all on show through the caseback.
The complication set is the same as the 2012 reference: jumping perpetual calendar with retrograde month indication, leap year display, day-night indication, and the one-minute tourbillon mounted on a polished steel bridge with screwed bayonet pinion. The tourbillon carriage runs in line with the small seconds at 6, which makes the rotation legible without the usual aperture trick.
Case: 41.9 by 13mm in 950 platinum
The case is the standard Lange 1 Tourbillon Perpetual Calendar shape at 41.9mm wide and 13mm tall, executed only in 950 platinum. The crown is at 2 o'clock and houses the corrector for the calendar functions, a Lange convention that keeps the case sides clean of recessed pushers. Water resistance is 30 metres, in line with every Lange Lumen reference.
What it costs
Lange has not published a retail price. Time and Watches notes the watch is sold price-on-request, which in practice means six figures and an allocation conversation with the brand rather than a posted-list approach. The 2012 reference traded at the time around CHF 295,000. The Lumen edition is positioned at the top of that anchor.
The watch is limited to 50 pieces total and is exclusively in 950 platinum. There is no steel or gold variant planned.
Why this matters
Lange has spent the last decade methodically extending the Lumen treatment across its catalogue. Each iteration teaches the brand how to make a more complicated calibre legible through a 5 percent transparent dial. The Lange 1 Tourbillon Perpetual Calendar Lumen is the hardest case yet because it asks the wearer to read both a tourbillon and a perpetual calendar through that same translucent layer. The watch is also one of the first to show a fully exposed Lange grand complication calibre under a tinted sapphire rather than over an opaque dial.
SJX's coverage reads the release as Lange's argument that the Lumen experiment can scale to its most complex references without losing the legibility that defined the early Lumen Zeitwerks. The 50-piece run suggests the brand views it as the same kind of grail-level release the Lange 1 Tourbillon Perpetual Calendar in honey gold turned into a decade ago, with each piece going to a Lange-aware collector rather than the secondary market.
Sources: Monochrome first look; SJX Watches; Time and Watches; WatchTime coverage; Fratello; Revolution Watch; WristReview; A. Lange & Söhne product page.
