Arnold & Son presents Perpetual Moon Obsidian, which boasts a beautiful made from Mexican obsidian and a large moon-phase complication. The stone is reflected in the large rhodium-plated moon and the perfectly polished hour-markers.
The Arnold & Son Perpetual Moon Obsidian stands out for the size of its moon-phase complication and the aesthetic approach employed by the resolutely British Swiss brand.
The 42 mm red gold case houses a precise hand-wound calibre A&S1512. On the movement side, a hand display allows for extremely fine adjustments. On the dial side, a large moon disc occupies almost the entire aperture, presented in a vast window with a round cut-out that allows the changing faces of the moon to be admired.
The realistic depiction is crossed by shadows and areas of relief to add to its presence. The moon is only visible because it reflects the light from the sun. In the same way, the light brings the Perpetual Moon Obsidian to life with its shimmering reflections.
The golden obsidian stone was sourced from Mexico. This volcanic stone has been mined in Central America since time immemorial and was used in particular in the religious ceremonies of pre-Columbian civilisations.
Obsidian has high silica content, making it a hard and shiny material. Its bronze hue extends far beneath the surface, right into the heart of the material. Despite the minute amount used for the dial, it still produces a glistening effect, reflected in turn in the hands and hour-markers.
Arnold & Son selected cool shades to contrast with the stone. The moon and hands are rhodium-plated and the hour-markers are made from diamond-polished white gold. Together, these choices enhance the reflections of the golden obsidian and the red gold of the case. To complete this contrasting interplay of warm and cool tones, the brand chose a blue alligator-leather strap with visible silver-coloured topstitching.
Like all the movements used by Arnold & Son, the calibre A&S1512 was entirely developed, produced, decorated, assembled, adjusted and cased up in the brand’s manufacture in La Chaux-de-Fonds. This calibre is based on a large barrel with an oscillation frequency of 3 Hz, giving a 90-hour power reserve. The moon phase display of this movement will remain accurate for 122 years before deviating from the actual lunar cycle by one day.
This watch is available in a limited edition of 28 pieces.
Model: Perpetual Moon Obsidian
Hours, minutes, moon-phase indicator, second moon-phase indicator on the back
Calibre A&S1512, hand-wound mechanical
Diameter: 34 mm
Thickness: 5.35 mm
Power reserve: 90 hours
Frequency: 3 Hz / 21,600 vph
Main plate: rhodium-plated, Côtes de Genève stripes radiating from the centre
Bridges: polished and chamfered
Wheels: circular satin-finished
Screws: blued and chamfered, polished heads
Rhodium-plated and circular-grained moon-phase indicator
Stone: golden obsidian
Sky: blue lacquered guilloché, silvered constellations
Moon: engraved rhodium-plated disc
Material: 18-carat red gold (5N)
Diameter: 42 mm
Thickness: 11.43 mm
Crystal: Domed sapphire with an anti-reflective coating on both sides
Case back: Sapphire crystal
Water-resistance: 30 m /100 ft
Blue alligator leather hand-stitched with silver-coloured thread
Buckle pin buckle, 18-carat red gold (5N)
Limited edition of 28 timepieces
Global retail price
CHF 31,900 excl. tax (may be subject to modifications)