Double Tourbillon White Gold Amber

2 600 000 kr


Double Tourbillon White Gold Amber

  • Limited edition
  • 43.5 mm
  • 18-carat White gold
  • Alligator leather

Double Tourbillon White Gold, amber edition

Baltic beauty  

A new material has joined Arnold & Son’s creative repertoire. A first in watchmaking, Baltic amber or ‘tiger’ amber further enhances the collection of extraordinary dials created by the house. The rich, moiré yellow of this exceptionally rare material surrounds the two iconic tourbillons in the eponymous collection. The amber brings softness and texture to the grey gold of the case and skeletonised bridges and the pure white of the opal hour dials, as well as an array of different and unique reflections, in the image of this exceptional and vibrant one-off edition

In the watchmaking language of Arnold & Son, the tourbillon is a rare construction, treated with the respect that its 260 years of history have taught the brand. The even more exceptional construction of the double tourbillon makes the collection a vehicle for one-off pieces, as is the case with this amber model. 

Double Tourbillon White Gold draws on the rich appearance of the stones that Arnold & Son explores with method and originality. After imperial jade, malachite and aventurine, the brand has now adopted amber.


Contrary to common belief, not all amber is translucent orange. Baltic amber has a creamy appearance and a surprising variety of colours. The shade chosen by Arnold & Son is a warm, moiré yellow.  

This amber is the fossilised resin of a wide variety of plants, particularly conifers, which grew on the Baltic Sea coast some 44 million years ago. Carried away by rising water levels, the plant matter began the geologically slow process of transformation. It gave rise to this precious, highly sought-after, symbolically rich material of astonishing aesthetic refinement.  

While natural materials – such as Arnold & Son’s signature stones – make each dial unique, amber adds an extra dimension of individuality. Exposure to sunlight will alter the shade of the stone over time. This will cause a perceptible change in the colour and opacity of the material, which will age very differently depending on how its wearer uses the timepiece. 


In historical terms, Double Tourbillon White Gold draws on the two most fundamental vocations of John Arnold’s work: chronometry and world time. His production of marine chronometers sought to simplify and augment the perfect reliability of time measurement. The aim was to keep track of the time at the point of departure. By comparing it with that of the place where the measurement was taken, based on observing true solar noon, ocean navigators were able to measure their position on an east-west axis – giving their longitude. 

Double Tourbillon White Gold perpetuates this duality by displaying local time on the small dial at 12 o’clock, calibrated by Roman numerals. It is complemented by a display of the time in another location at 6 o’clock, using Arabic numerals. These two dials display hours and minutes that are completely independent, and accurate to the minute.  


Double Tourbillon White Gold draws on the Manufacture’s design, production, finishing and adjustment capabilities. The sapphire crystal is convex to accommodate the depth of the two tourbillons, which are in turn each secured to a three-dimensional, skeletonised, cantilevered bridge in white gold. They are also at the end of a double gear train. The A&S8513 calibre is thus equipped with two barrels, two crowns and two time zones. 

They can display the same time, two different times, or one can tell the time while the other is timing a long event. Unlike the vast majority of so-called travel watches, Double Tourbillon White Gold can thus adapt to time zones that are offset by 15, 30 or 45 minutes. 


The structure of this movement is underscored by extremely sophisticated finishes. This is a speciality of the Arnold & Son manufacture, and it is taken to the very highest level in this model. From the radiating Côtes de Genève stripes to the circular-grained mainplate, the double-snailed barrels, the sunray-brushed crown wheels and the polished gold chatons, everything about the A&S8513 calibre exudes elevation, craftsmanship and excellence. 

The bevelling, satin-finishing and mirror-polishing of the tourbillon bridges in solid white gold is the highlight of an exceptionally elegant display in relief. Double Tourbillon White Gold offers a mechanical and ornamental counterpart to the symbolic aesthetic that reigns on its dial.

Technical specifications


  • local hours and minutes (Roman numerals)
  • independent reference hours and minutes (Arabic numerals)


  • Calibre: A&S8513, hand-wound mechanical
  • Jewels42
  • Diameter37.30 mm
  • Thickness: 8.35 mm
  • Power reserve90 hours
  • Frequency3 Hz/21,600 vph
  • Finishes                                
    main plate: NAC-treated, pearlised
    bridges: NAC-treated, polished and chamfered, radiating Côtes de Genève stripes
    wheels: circular-grained, polished and chamfered
    chatons: 18-carat white gold
    screws: chamfered, mirror-polished heads
    tourbillon bridges: 18-carat white gold, mirror-polished, satin-finished and hand-chamfered
    tourbillon carriages: polished and hand-chamfered


  • Baltic amber

Hour dial                              

  • white opal


  • Material: 18-carat white gold
  • Diameter: 43.50 mm
  • Crystal: domed sapphire with an anti-reflective coating on both sides
  • Case back: sapphire crystal with an anti-reflective coating
  • Water resistance: 3 bar (30 metres/ 3 ATM)


  • jungle-green alligator leather with papaya-yellow alligator leather lining, hand-stitched
  • Buckle: folding clasp, 18-carat white gold


  • 1DTAW.Z07A.C291W

One-off pieces                     


As a contemporary Swiss watch brand, Arnold & Son continuously reinvents its approach to pay homage to the work of John Arnold, a man who provided solutions to the challenges of his era, notably the accuracy and reliability of timepieces. As a renowned watchmaker, he produced some of the most accurate marine chronometers of the 18th century and won several awards from the Bureau des Longitudes, spurring him on in his research into timekeeping. As an inventor, he filed a number of patents, including one for a compensation balance featuring a bimetallic balance-spiral (1775) and another for a helical balance spring with terminal curves (1782). He also produced simplified chronometer design principles that permitted mass production of these timepieces, a number of which were made available to His Majesty’s Royal Navy, making John Arnold one of its principal suppliers. One of his least known but most significant contributions was the modern definition of the term ‘chronometer’, which today refers to a high-precision timepiece driven by a movement that has passed an accuracy inspection carried out by an official neutral body.


A Fine Watchmaking House stands out for its mastery of the classics. Arnold & Son has based its identity on its ability to produce fine watchmaking complications that are linked to the heritage of John Arnold. These include true seconds (or dead-beat seconds) – a function recalling the escapements of pendulum clocks marking out the seconds – and dual time zones driven by twin regulating organs, which hark back to the original method of maritime positioning. The moon-phase displays also illustrate the brand’s mastery of the classics, while revealing a more unconventional side through the use of large moons in sculpted gold. Lastly, the power reserves of up to eight days offered by Arnold & Son pay homage to marine chronometers, which also benefited from an impressive autonomy.

The twenty or so calibres presented to date by Arnold & Son have all been conceived, designed, developed, machined, decorated, assembled and adjusted by its sister Manufacture, La Joux-Perret. This independence and creativity demonstrate the House’s ability to perpetuate John Arnold’s exceptional inventions.


The style of Arnold & Son timepieces is instantly recognisable. The three-dimensional architecture of their movements, the late-18th-century-style cantilever balance-cocks, the George-V-style bridges, the constant quest for multiaxial symmetry and the artfully crafted guilloché dials go hand-in-hand with openworked components, from a single barrel to the full range of grande complication calibres.


Arnold & Son’s remarkably balanced collections are all produced in limited series and distributed around the world through carefully selected points of sale. They are priced fairly, because excellence is bound to honesty.

As Swiss watches with English roots, they stand out without being ostentatious. Arnold & Son timepieces are a delight for the eyes and the mind, and are aimed at customers who are looking for something unique.

Astronomy, Chronometry and World Time

Arnold & Son's three founding principles

Throughout human history, measuring time has always referred to the stars. It was by observing certain stars and understanding their cycle that the first calendars were established with impressive accuracy. It took several millennia before this precision was enclosed in a timepiece like the ones designed by John Arnold. 

The golden age of maritime explorations and discoveries ushered this precision into a new technical ideal – determining longitude at sea. Its immediate corollary was the identification of local time, which changed constantly as the observer moved along an east-west axis. Astronomy, chronometry and what we now call world time are thus inextricably linked within one and the same question, to which John Arnold and his son devoted their lives, their art and their genius. 

This is how these three dimensions – astronomy, chronometry and world time – have come to be embodied in the House's contemporary timepieces.  Echoes of John Arnold's inventions and preoccupations, these pillars represent the foundations on which the Arnold & Son collections are based.

Chronometry: Be accurate

Rate accuracy, which is known as chronometry, is the key requirement of Arnold & Son's contemporary watchmaking. It is the standard of excellence for its collections, the first condition to be met and constantly checked, whether it is at the forefront or in the background of a watch designed by Arnold & Son. It is the most discreet of a movement's characteristics. 

When building an Arnold & Son collection, all the thinking is focused on this chronometry. The manufacture calibres are based on advanced technical fundamentals that are not necessarily the best known. One of them is the choice of small, lightweight balances capable of rapidly returning to their isochronous rate after the latter has been disturbed by inevitable everyday shocks. Another is the routine use of large barrels or even two series-coupled barrels to store the energy required for the movement to function.  They consequently provide Arnold & Son's manual winding calibres with above-average power reserves of 90 hours and more. A third is the particular attention paid to manufacturing the gear trains, roller-burnishing the pinions and polishing the gear teeth, as well as the precision of the machining and therefore the relative positions of the moving parts, a key concept in rate accuracy.

The tourbillon (or the fact of putting the regulating organ in rotation on its axis to best adjust the effects of gravity on the balance and its hairspring) was patented after John Arnold's death, but it was undoubtedly at the heart of his chronometric research and discussions with his friend Abraham-Louis Breguet, who incidentally assembled his first tourbillon on a John Arnold pocket watch in homage to this great watchmaker. Nowadays, the tourbillon has become a must in Arnold & Son collections.

While the tourbillon was not a complication in John Arnold's time, constant force underpinned the design of his marine chronometers. The regularity of the rate of the sprung balance relies on the consistency of the energy that it receives. However, this naturally fluctuates due to the circular and spiral nature of the mainspring contained in the barrel. To achieve a perfectly smooth torque, in other words a constant force, Arnold & Son uses a one-second constant-force mechanism. Housed just before the escapement, it stores up a small but always equal amount of energy in a secondary spring, the remontoire. Thus, every second, the sprung balance receives very precisely the same force to power its oscillations. These become more even, thereby creating the conditions for a high-precision rate.

Arnold & Son also works with another of John Arnold's historical chronometry indicators: deadbeat seconds, a mechanism that was indispensable to navigators at the time for calculating longitude. This mechanism advances one step each second, rather than six or eight smaller jumps in sync with the frequency of the balance. Instead of the term deadbeat seconds, Arnold & Son prefers a name whose very sound means accuracy: “true beat second”. Its jump is a signature of John Arnold's marine chronometers and a complication that is still alive and well in the House's collections.

Astronomy: Under the sky

The Pole Star, Southern Cross, astrolabes and sextant: measuring time has relied on the recurrence of astronomical phenomena in order to find long, reliable points of reference there that can be used under any conditions. The fruit of the human ingenuity, patience and dedication of countless observers and astronomers from every culture, these markers of cyclical time are foundational for Arnold & Son watchmaking.

Astronomical complications are a signature of Arnold & Son collections, with the moon as the heavenly body of choice, main subject and major inspiration. The distinctive feature of the Brand's moon phase timepieces is that they feature “astronomical” display precision as a matter of course. This term corresponds to an accumulated one-day deviation in the moon phase display every 122 years. Since setting this complication requires great finesse, the Arnold & Son moons generally have a double display with a secondary indicator on the case back next to the movement. This extremely rare display bears witness to Arnold & Son's involvement in all types of development and reflects its favoured themes, which are as much chronometric as astronomical.

Over and above their precision, Arnold & Son's moon phases attract all the light, either with a large moon opening up over half the dial, or with a 12-mm three-dimensional rotating moon, making it the largest of all moons. Whether in two or three dimensions, the moon is always treated as a small work of artistic craftsmanship, composed of materials that are rare in watchmaking such as marble or Paraíba tourmaline, or delicate such as mother-of-pearl, meteorite or aventurine glass. The Arnold & Son moon also shines at night, often with a subtle addition of luminescent material. 

World Time: Here, elsewhere, everywhere

With ocean navigation, humankind divided up the world and invented longitudes, which were calculated by comparing the local time, observed using the sun, and the time at a starting point, kept by an extremely reliable timepiece. John Arnold was one of the leading suppliers of chronometers to the British Navy. He was the one who successfully improved the reliability and simplified the production of these indispensable marine chronometers, so much so that he became a benchmark among great explorers such as James Cook and later Dr David Livingstone. The indication of several time zones is therefore integral to Arnold & Son's watchmaking identity.

As this navigation was itself inseparable from cartography, for this world time complication Arnold & Son has chosen to depict a three-dimensional terrestrial hemisphere, making it possible to tell what time it is at any point.

In parallel to this graphic vision, Arnold & Son has developed a second approach to the time elsewhere in the world: with a double tourbillon featuring two distinct rotating regulating organs, making it possible to follow time zones offset by 15, 30 or 45 minutes compared to a full hour – a freedom in terms of setting that remains extremely rare. 

Once again, and because this double display is based on a profoundly chronometric complication, Arnold & Son’s fundamental principles are interwoven. One never advances alone; there are always two – if not three – together. This is how a pillar's strength is measured: it relies on the next one, creating the conditions for a solidity that stands the test of time.

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