Description
The Patek Philippe Celestial Reference 6105G-001 is the most technically significant watch unveiled at Watches & Wonders 2026 — and arguably the most technically significant Patek complication of this decade. It is the first wristwatch in history to mechanically display the exact times of sunrise and sunset. Five years of development, six patents, and a new movement designation: Calibre 240 C LU CL LCSO. At 47mm in 18K white gold, the 6105G carries a sky chart of Geneva above its dial and gives its owner one of the most profound pieces of astronomical information a mechanical watch has ever attempted to provide.
Design
The 47mm white gold case is generous by necessity — the dial carries an extraordinary amount of information that demands space for legibility. The dial presents the Geneva night sky chart as a central element, rendered with Patek's characteristic precision and restraint. Surrounding the sky chart, the sunrise and sunset time displays are positioned for immediate readability; the moon's angular movement and phase occupy their own dedicated zones, as does the date. Despite the informational density, the dial reads with Patek's characteristic restraint — a long tradition on the Celestial family, where the technical achievement must never overwhelm the aesthetic experience. The Calibre 240 C LU CL LCSO is visible through the exhibition caseback.
Specifications
- Reference: 6105G-001
- Case: 47mm, 18K white gold
- Movement: Calibre 240 C LU CL LCSO (in-house, self-winding)
- Indications: Sunrise time, sunset time, sky chart (Geneva), angular moon movement, moon phase, date
- Sunrise/sunset display: Variable daily times, mechanically computed for Geneva latitude
- DST correction: Automatic mechanical correction when clocks change
- Development time: 5 years
- Patents: 6 associated patents
- Caseback: Exhibition sapphire
- Price: To be confirmed (expected CHF 500,000+)
What's Exciting
The sunrise and sunset complication is harder than it sounds. The times of sunrise and sunset are not constant — they vary every single day of the year as a complex function of the observer's geographic latitude, the calendar date, and the equation of time (the difference between mean solar time and apparent solar time caused by Earth's elliptical orbit and axial tilt). A mechanical watch must encode this three-variable function across 365+ days simultaneously, using only physical cams, levers, and differential mechanisms — no electronics, no programming. Patek's six patents cover the mechanisms by which the movement tracks calendar date, solar position, and geographic correction simultaneously. One patent covers a purely mechanical auto-correction for daylight saving time — a solution to a problem that would seem to require a computer. This is watchmaking's answer to the question "what can mechanics achieve that electronics cannot design around?" The answer: anything, given enough time and genius.
History
Patek Philippe's celestial complications trace back to the nineteenth century, when the manufacture produced extraordinary astronomical pocket watches for observatory testing and royal patronage. The modern Celestial line on wristwatches began with the Ref. 5102 in 2002, which displayed the night sky chart and moon phase on a rotating disc. The Sky Moon Tourbillon (Ref. 5002, 2001) combined the sky chart with a minute repeater, retrograde date, and tourbillon — and remains one of the most complex wristwatches ever made at CHF 2.5 million. The 6105G sits in this lineage but breaks genuinely new ground: no previous wristwatch of any manufacturer has mechanically computed and displayed the variable daily times of sunrise and sunset. Five years of development and six patents separate the concept from the achievement.
