Clear Skies
Maturity, diversity and mechanical exclusivity: the Perpetual Moon collection is constantly being enriched with new creations, consistently reaffirming the watchmaking and artistic talents of Arnold & Son. Following two other editions, one with salmon pink accents and another in sky blue, Perpetual Moon 41.5 Platinum is now available in this limited fern green version of 28 timepieces.
Technical Specifications
Functions
Movement
- Calibre:
- A&S1512 (view calibre)
- Jewels:
- 27
- Diameter:
- 34.00 mm
- Thickness:
- 5.35 mm
- Power reserve:
- 90 hours
- Frequency:
- 3 Hz / 21,600 vph
Dial
Moon phases
- sky:
- grained, with midnight-blue PVD treatment
- constellations:
- hand-painted, enhanced with Super-LumiNova
- moons:
- mother-of-pearl discs enhanced with Super-LumiNova, hand-painted details
Case
- Material:
- platinum (Pt950)
- Diameter:
- 41.5 mm
- Thickness:
- 11.30 mm
- Crystal:
- domed sapphire, with an anti-reflective coating on both sides
- Back:
- sapphire crystal, with an anti-reflecting coating
- Water resistance:
- 3 bar (30 metres/100 feet)
Strap
- Material:
- Cornwall green leather, hand-stitched
- Buckle:
- pin buckle, platinum (Pt 950)
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Gallery
Shimmering
The “Stellar Rays” finish enlivens the dial with a sophisticated shimmer. This aesthetic is achieved through cleverly irregular engraving. Various depths and widths of rays coexist and follow on from one another, creating a unique rhythm. Their succession produces a fluctuating play of light, accentuated by the depth created by several layers of transparent lacquer.
Realistically depicted and set against a grained sky with a midnight blue PVD treatment, the large white mother-of-pearl moon is also overlaid with Super-LumiNova. Invisible by day, this added colour gives it a whole new face by night
.
constellations
The large white mother-of-pearl moon is realistically rendered with hand-painted shadows and coated with Super-LumiNova. It is placed on a grained sky featuring a midnight-blue PVD treatment. Following the tradition of the Perpetual Moon collection, it is surrounded by the Big Dipper and Cassiopeia constellations, which are also hand-painted and coated with luminescent material.
The constellations have been chosen as a reference to John Arnold’s history as a maker of naval chronometers. The Big Dipper and Cassiopeia have been used as points of reference since time immemorial.
Accuracy
On the case back, a secondary indicator allows the moon phase to be adjusted quickly and precisely. The hand-wound calibre that powers it, reference A&S1512, is capable of tracking the development of its segments with exceptional precision. The duration of a complete lunar cycle is 29 days, 12 hours, 44 minutes and 2.8 seconds. Arnold & Son has succeeded in representing it in such a way that it would take 122 years for this movement, if regularly wound, to accumulate a day’s difference between its display and celestial reality.
Like all Arnold & Son movements, the A&S1512 calibre has been entirely developed, manufactured, decorated, assembled, adjusted and cased at the Manufacture in La Chaux-de-Fonds. The calibre features two barrels and an oscillating frequency of 3 Hz, providing a power reserve of 90 hours.