The new Arnold & Son Luna Magna Platinum model with a spherical astronomical moon has a sand-coloured PVD-treated meteorite dial.
The part of the moon in shadow is also made from meteorite. In a final harmonious touch, Luna Magna Platinum shines with a distinctive glow at night thanks to the Super-LumiNova coating on its moon hemisphere and opal subdial.
With a satin circular-grained finish, the hour and minute subdial is crafted from white opal, a semiprecious gemstone known for its purity and delicacy and befitting of Luna Magna’s complication. The off-centred position of this display frees up the dial, which is adorned with a large sand-coloured meteorite disc.
At 6 o’clock, the three-dimensional moon is carved from the same meteorite and Cacholong opal whose properties lend it to sculpting. Lastly, the understated shine of the platinum case establishes the distinguished elegance of this limited edition of 28 pieces.
Arnold & Son chose a meteorite from the octahedrite class that, once worked, reveals “Widmanstätten patterns”, which are instantly recognisable for their jagged criss-crossing structures. The PVD treatment in a grey-beige shade reminiscent of stardust brings out the striking geometric motifs, creating a sense of harmony with Luna Magna’s astronomical complication.
The various materials catch the light and give this timepiece multiple different faces. The cool shine of the platinum is tempered by the iridescence of the meteorite and the milky whiteness of the various opals. Arnold & Son selected these stones both for their moon-like porcelain hue and their properties which make it possible to add Super-LumiNova – invisible by day but glowing blue-green at night.
Luna Magna Platinum is driven by the A&S1021 calibre, which has been fully developed, manufactured, assembled and adjusted in the Arnold & Son Manufacture.
This hand-wound calibre, which has been designed with the lunar globe in mind, features a 90-hour power reserve and a regulating organ oscillating at a frequency of 3 Hz. The movement includes a secondary display detailing the age of the moon on the case-back side.
The duration of a complete lunar cycle is 29 days, 12 hours, 44 minutes and 2.8 seconds. The Manufacture has managed to replicate it in such a way that it will take 122 years for the movement’s display to deviate from the correct celestial reading by one day.
The correction required at this time will be easy to make, as the Luna Magna Platinum’s moon-phase function can be accessed directly via the crown.
Model: Arnold & Son Luna Magna Platinum (meteorite & opal)
Hours, minutes, astronomical moon phases (one-day correction required every 122 years), moon-phase indicator on the back
Calibre A&S1021, mechanical with manual winding
Diameter: 37.60 mm
Thickness: 12.00 mm with three-dimensional moon (4.75 mm without moon)
Power reserve: 90 hours
Frequency: 3 Hz / 21,600 vph
Main plate: circular-grained
Bridges: Côtes de Genève stripes radiating from the centre, chamfered
Wheels: circular satin-finished
Screws: blued and chamfered, polished heads
Moon-phase indicator: circular satin-finished
Meteorite, sand-coloured PVD treatment
Hour dial: white opal with Super-LumiNova
Flange: sand-coloured PVD treatment
Moon: 12.00 mm in diameter, meteorite with sand-coloured PVD treatment and Cacholong opal with Super-LumiNova
Material: Platinum (Pt 950)
Diameter: 44.00 mm
Thickness: 15.90 mm (with crystal)
Crystal: Box sapphire, anti-reflective treatment on both sides
Back: Box sapphire crystal, anti-reflective treatment
Water-resistance: 30 metres / 100 feet
Grey alligator leather, orange alligator leather lining, hand-sewn
Platinum (Pt 950) and titanium folding buckle
Limited edition of 28 pieces
Swiss retail price
CHF 70,900 incl. tax (subject to change)