Hermès Arceau L’heure de la lune watch

The new Arceau L’heure de la lune watch offers a unique vision of the Moon with the simultaneous display of lunar phases in both northern and southern hemispheres. Two mobile counters gravitate on a meteorite or aventurine dial, revealing mother-of-pearl moons in step with an exclusive module, coupled with a Manufacture Hermès movement.

The mobile counters displaying the time and date turn weightlessly to reveal the moon discs, while maintaining their horizontal orientation. This contemporary dance is choreographed by a module exclusively developed for Hermès and for which a patent has been fled. With a total thickness of just 4.2mm, its 117 polished and bead-blasted components are incorporated within the Manufacture Hermès H1837 movement: a technical challenge designed to preserve the slenderness of the overall mobile chassis, which sweeps around the dial in 59 days.

The mother-of-pearl moons set into the stone display the lunar cycles in the northern and southern hemispheres. This mysterious game of hide-and-seek reveals nothing of its technical complexity, so as to give pride of place to dreams. The horse, representing the origins of Hermès, gallops elegantly into the world of dreams. At 12 o’clock, the moon is adorned by a Pegasus created by the “dreamer designer” Dimitri Rybaltchenko.

Entitled Pleine Lune (Full Moon), this portrayal of the winged horse hints at a passage between two worlds, where magic and reality merge. On the other side, at 6 o’clock, the view of the moon from the northern hemisphere provides a realistic depiction of its surface.

An offbeat expression of a classic horological complication, the Arceau L’heure de la lune watch offers an original interpretation of Hermès watchmaking expertise. Framed by a white gold case, the mechanics adopt a light, barely-there role. Meteorite or aventurine inlaid with mother-of-pearl form a cosmos in which satellite dials float above hemispherical moons. These mischievous displays have swapped cardinal points, with the south above and the north below.

Within this space-time, metal, stars and rock seamlessly merge the watch exterior with the movement to form an unprecedented technical and aesthetic display of simple and graphic readability. The double moon here eclipses a traditional aperture-type display, instead covering the entire surface of the dial.

The Arceau case with its asymmetrical lugs, designed by Henri d’Origny in 1978, becomes a lunar crater made of meteorite stone or aventurine, while the lacquered dials, gravitating like satellites, display Arabic numerals with a distinctive sloping font. This Haute Horlogerie timepiece is issued in two 100-piece limited editions, and fitted with a matt alligator strap in graphite grey or abyss blue.

Technical details

Dials
Aventurine Dial Version: White-lacquered mobile counters, black transfers
Meteorite Dial Version: Gradated grey-lacquered mobile counters, white transfers
Moons in white natural mother-of-pearl
Southern moon: Pegasus transfer inspired by the Pleine Lune motif designed by Dimitri Rybaltchenko
Northern moon: lunar surface transfer
Blued hands

Case
Designed by Henri d’Origny in 1978
White gold case (≈ 68.2g)
43mm in diameter, 22mm interhorn width
Antiglare sapphire crystal and case-back
Water-resistant to 3 bar

Movement
Hermès Manufacture H1837 movement
Mechanical self-winding, Swiss made
Diameter: 26mm (11½’’’)
Thickness: 3.7mm
193 components, 28 jewels
Frequency: 28,800 vph (4Hz)
Circular-grained and snailed baseplate, satin-brushed bridges and oscillating weight, signature “H” pattern

Module
Exclusive “L’heure de la lune” module
Diameter: 38mm (16¾’’’)
Thickness: 4.2mm
117 components, 14 jewels
Polished and bead-blasted bridges

Functions
Hours, minutes, date, double moon phase (display of moon phases seen from the northern and southern hemispheres)

Strap
Aventurine Dial Version: Matt abyss blue alligator
Meteorite Dial Version: Matt graphite grey alligator
17mm white gold folding clasp (≈ 26.39g)

Edition
Aventurine Dial Version: 100-piece limited and numbered edition
Meteorite Dial Version: 100-piece limited and numbered edition

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