The Arnold & Son Perpetual Moon 41.5 Platinum “Horse of the Dunes” (Ref. 1GLBX.Z03A.C1479X) is a limited edition of only 8 pieces that merges artistic craftsmanship with the precision of the maison’s astronomical moon phase complication from La Chaux-de-Fonds.
Artistic Savoir-Faire and Night Sky Composition
The expressive power of this timepiece lies in the meticulous execution of métiers d’art on the dial. The centerpiece is a sculpted horse, hand-engraved in 18-karat white gold, whose detailed muscular contours and flowing mane dominate the scene over a black aventurine glass background speckled with metallic inclusions.
- White Gold Engraving: 18-karat white gold applique hand-sculpted with millimeter precision.
- Dune Landscape: Hand-painted sand dunes infused with Super-LumiNova, offering depth and a brilliant glow in the dark.
- Mother-of-Pearl Moon Phases: Two iridescence-treated mother-of-pearl discs coated with luminescent material recreate the orbital cycle against a starry aventurine sky.
Astronomical Precision: Calibre A&S1512
At the heart of the platinum case beats the hand-wound calibre A&S1512, fully developed, decorated, and assembled in-house. Thanks to its twin-barrel configuration, it delivers a 90-hour power reserve alongside an astronomical moon phase accuracy that requires a one-day adjustment only once every 122 years.
Fine Adjustment Detail: Visible through the sapphire crystal caseback, the movement incorporates a secondary graduated moon phase indicator, allowing for quick reading and exact setting of the lunar age.
John Arnold’s Heritage and High Marine Precision
Founded by the renowned British watchmaker John Arnold in the 18th century, Arnold & Son played a pivotal role in solving the problem of determining longitude at sea through the development of highly precise marine chronometers. Today, based in La Chaux-de-Fonds, the maison honors this legacy by pairing astronomical complications with the most demanding métiers d’art techniques.
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Technical Specifications
| Feature | Technical Detail |
|---|---|
| Case | 950 platinum, 41.5 mm diameter, 11.67 mm thickness |
| Dial | Black aventurine glass, hand-engraved 18k white gold horse applique, Super-LumiNova painted dunes |
| Movement | Hand-wound Calibre A&S1512, 27 jewels, 21,600 vph (3 Hz) |
| Functions | Hours, minutes, astronomical moon phases, secondary lunar age indicator on caseback |
| Power Reserve | 90 hours (twin barrel) |
| Crystal & Caseback | Domed sapphire crystal with anti-reflective coating on both sides / Sapphire caseback |
| Water Resistance | 3 bar (30 meters) |
| Strap | Black alligator leather with sand-beige alligator lining and 950 platinum pin buckle |
| Limited Edition | 8 pieces |
| Retail Price | CHF 74,500 (incl. Swiss VAT) |
