Arnold & Son Luna Magna Platinum Limited Edition

This brand new Luna Magna watch in Platinum boasts an aventurine crystal sky dial featuring a large three-dimensional moon composed of blue aventurine and grey marble.

Featuring a fully polished 950 platinum case, this celestial inspired timepiece also features a white mother-of-pearl hour and minute sub-dial in a satin-brushed ring.

Arnold & Son Luna Magna Platinum Limited Edition

The Arnold & Son Luna Magna Platinum watch is a limited series of only twenty-eight pieces. Set in aventurine crystal, the metallic crystals bring the dial to life with their brilliance. Half of the 12 mm three-dimensional moon is made of grey marble and the other half of aventurine crystal, reflecting the moon’s dual nature.

Arnold & Son Luna Magna Platinum Limited Edition

The hours and minutes are displayed on the graduated dial with twelve Roman numerals bearing the Arnold & Son signature. This eccentric disc owes its luminosity to the slightly iridescent white mother-of-pearl.

Luna Magna Platinum is based on the A&S1021 calibre, which has been fully developed and then assembled and adjusted in Switzerland. Designed around the lunar globe, the movement is hand-wound and features a 90-hour power reserve and regulating mechanism set at 3 Hz. On the back is a secondary display, with clearly legible lunations for fine adjustments.

Arnold & Son Luna Magna Platinum Limited Edition

The celestial mechanism also owes its sophisticated design to the fidelity in its astronomical accuracy. The duration of a complete lunar cycle is 29 days, 12 hours, 44 minutes and 2.8 seconds.

Arnold & Son have succeeded in approximating this cycle such that, if the watch was never stopped, it would take 122 years for the moon-phase display to accumulate a day’s discrepancy from the correct phase. And the correction is easy, since Luna Magna Platinum’s lunar function is accessible directly from the crown.

Arnold & Son Luna Magna Platinum Limited Edition

Technical details

Model: Luna Magna Platinum
Reference: 1LMAX.A01A.C183A

Hours, minutes, astronomical moon-phase (correction one day in every 122 years), moon-phase indicator on back

Calibre A&S1021, hand-wound mechanism
Jewels: 35
Diameter: 37.60 mm
Height: 12.00 mm with three-dimensional moon (4.75 mm without moon)
Power reserve: 90 hours
Frequency: 3 Hz / 21,600 vph

Platinum: pearlised
Bridges: sunray and chamfered Côtes de Genève
Wheels: circular-grained satin finish
Screws: blued and chamfered, polished heads
Moon-phase indicator: circular-grained satin finish

Aventurine crystal
Hour dial: white mother-of-pearl
Flange: blue PVD coating
Moon: diameter: 12.00 mm; grey marble and aventurine crystal

Material: 950 platinum
Diameter: 44.00 mm
Thickness: 15.90 mm (with crystal)
Crystal: Domed sapphire, anti-reflective coating on both sides
Back: Sapphire crystal, anti-reflective coating on both sides
Water resistance: 30 metres/100ft

Material: Alligator leather, blue (exterior) and dark magenta (interior), hand-stitched
Buckle: Pin, platinum PT950

Limited edition of 28 pieces

Global retail price
CHF 55,900 (subject to modification) excl. tax