Arnold & Son Luna Magna Ultimate II Limited Edition

Arnold & Son has released a new high-jewellery version of its three-dimensional moon model.

A limited edition of eight pieces, the Arnold & Son Luna Magna Ultimate II watch entices the eyes with its unique alliance of baguette-cut diamonds, Paraíba tourmaline and PVD-treated ruthenium crystals.

The 44 mm diameter case is crafted from 18K white gold and is studded with no fewer than 7.62 ct of exceptional-quality diamonds.

Arnold & Son Luna Magna Ultimate II Limited Edition

The extraordinary colour of the Paraíba tourmaline is the finishing touch on this exotic and refined piece in blue-green tones bordering on turquoise. The bezel and the lugs of Luna Magna Ultimate II are adorned with 112 invisible-set baguette-cut diamonds totalling 5.90 ct.

The glittering appearance of the dial is due to millions of pure ruthenium crystals. This extremely hard metal is much rarer than platinum. For Luna Magna Ultimate II, the ruthenium was reformed into crystals and dyed using complex processes, before being deposited onto a dial plate.

Arnold & Son Luna Magna Ultimate II Limited Edition

A traditional dial is located at 12 o’clock, marked with 12 signature Arnold & Son Roman numerals. This off-centre subdial owes its pristine, slight milky white hue to opal.

Its classic design harks back to the aesthetics of the famous marine chronometers made by English watchmaker John Arnold. Under the time display, Luna Magna’s three-dimensional moon takes on a new appearance.

Arnold & Son Luna Magna Ultimate II Limited Edition

The white gold globe is entirely pavé-set. It is split into 161 brilliant-cut diamonds, representing the illuminated side of the moon, and the same number of Paraíba tourmalines for the portion in shadow.

Luna Magna Ultimate II is driven by the A&S1021 calibre, which has been fully developed, manufactured, assembled and adjusted in the 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.

Arnold & Son Luna Magna Ultimate II Limited Edition

The movement offers a secondary display on the case-back side presenting the phase of the moon. Its clearly readable markings are designed for high-precision adjustments.

The duration of a complete lunar cycle is 29 days, 12 hours, 44 minutes and 2.8 seconds, and Arnold & Son 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’s moon-phase function is directly accessible from the crown.

Technical details

Model: Arnold & Son Luna Magna Ultimate II
Reference 1LMM.WZ04A.C213A

Hours, minutes, astronomical moon phases (a correction of one day required every 122 years), moon-phase indicator on the back

Calibre A&S1021, hand-wound mechanical
Jewels: 35
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

Lagoon-blue PVD-treated ruthenium crystals
Hour subdial: white opal
Moon: 12.00 mm diameter, 18K white gold, set with 161 diamonds (~0.75 ct) and 161 Paraíba tourmalines (~0.64 ct)

18K white gold, bezel invisible set in two rows and set lugs for a total of 112 baguette-cut diamonds (~5.90 ct)
Diameter: 44.00 mm
Thickness: 15.90 mm (with crystal)
Crystal: Domed sapphire with anti-reflective coating on both sides
Case back: Sapphire crystal with anti-reflective coating on both sides
Water-resistance: 30 metres / 100 feet

Lagoon-blue alligator skin, raspberry-pink alligator-skin lining, hand-stitched
Pin buckle, 18K white gold, set with 26 baguette-cut diamonds (~0.97 ct)

Diamonds: Total weight: ~7.62 ct/ colour: D-E-F/ clarity: IF-VVS
Paraíba tourmalines: Total weight: ~0.64 ct/ colour: blue-green/ clarity: loupe grade

Limited edition of 8 timepieces

Swiss retail price
199,900 CHF incl. tax (subject to change)