Arnold & Son Double Tourbillon Jade

Arnold & Son is celebrating its Double Tourbillon collection with the unveiling of two unique pieces adorned with dazzling green jade and delicate white opal. The two independent tourbillons and two time zones of this rare model have taken on a new face.

The new Double Tourbillon Jade models are available in either red gold or white gold. The green jade dial is punctuated by two opal sub dials in immaculate white. The A&S8513 calibre allows its two independent tourbillons to emerge into view above these rare stones. United by a shared main plate, each displays a different time zone.

Arnold & Son Double Tourbillon Jade

Sourced from Wyoming, the bright green nephrite (jade) known as “Apple Green” is slightly veined with black. This brings greater depth, contrast and makes the stone all the more precious.

The dial plate of the Double Tourbillon Jade has been expertly cut in a very particular way. In the shape of a clover, the main plate allows both dials and tourbillons to emerge to their full height. This complicates the stone cutting and engraving stages, which further underlines the mastery of the work.

Arnold & Son Double Tourbillon Jade

The Double Tourbillon Jade movement is integrated into a red gold or white gold case with a diameter of 43.5 mm. Its sapphire crystal is domed, accommodating the height created by the two tourbillons. These are attached to a three-dimensional, skeletonized, cantilevered bridge, and are made in the same gold as the case.

Arnold & Son Double Tourbillon Jade

Paying homage to its founder, John Arnold, one of the most inventive watchmakers of his time and of the golden age of chronometry, Arnold & Son has always approached the double time zone with sophistication and precision. Instead of the classic “GMT” system, where an hour hand in the centre indicates the second time zone, Arnold & Son has chosen to give each time zone its own regulating organ: a reminder of the duality of time telling methods – timepieces on one hand, astronomy on the other – used on board English frigates in the 18th century.

Arnold & Son Double Tourbillon Jade

The A&S8513 calibre is therefore equipped with two barrels and two crowns that control the two time zones. At midday, the local time is visible in Roman numerals. At six o’clock, Arabic numerals indicate the time of a second, more distant place that has a connection to the wearer. The two time zones are set completely independently down to the minute. Unlike most so-called travel watches, the Double Tourbillon Jade can therefore follow time zones offset by 15, 30 or 45 minutes, as is the case with certain countries in Central Asia.

Arnold & Son Double Tourbillon Jade

The structure of the movement can be seen on the back of the Double Tourbillon Jade. From the radiant Côtes de Genève to the circular-graining on the main plate, double snailing of the barrels, sunray decoration on the crown wheels, and polish on the gold bezels held in place by blued screws, everything about the A&S8513 calibre exudes eminence, craftsmanship and excellence.

Technical details

Model: Double Tourbillon Jade

Functions
Local hours and minutes (Roman numerals)
Independent reference hours and minutes (Arabic numerals)

Movement
Calibre A&S8513, mechanical hand-wound movement
Jewels: 42
Diameter: 37.30 mm
Height: 8.35 mm
Power reserve: 90 hours
Frequency: 3 Hz / 21,600 vph

Finishes
Main plate: sunray Côtes de Genève
Bridges: rhodium (red gold) or NAC (white gold) coated, polished, and chamfered by hand
Wheels: satin finish
Bezels: 18-carat gold
Screws: bevelled, mirror polished heads
Tourbillon bridges: 18-carat gold, mirror polished with satin finish, polished and chamfered by hand
Tourbillon cages: polished and chamfered by hand

Dial
Dial base: green jade
Sub-dials: white opal

Case
Material: 18-carat white or red gold (5N)
Diameter: 43.50 mm
Crystal: Domed sapphire, anti-reflective coating on both sides
Back: Sapphire crystal, anti-reflective coating
Water resistant: 30 metres/100ft

Strap
Material: Alligator leather, hand-stitched
Buckle: Pin, 18-carat white or red gold (5N)

References
1DTAR.Z01A.C120R (red gold)
1DTAW.Z01A.C121W (white gold)

Unique pieces
1 piece (red gold) and 1 piece (white gold)

Worldwide retail price
CHF 198,000, subject to change(excluding tax)