ARNOLD & SON – Chronometry Constant Force Tourbillon 11 Platinum Edition

ARNOLD & SON – CHRONOMETRY Constant Force Tourbillon 11 Platinum 41.5 Edition - 2026

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  THE ESSENCE OF A 260-YEAR HERITAGE

With their new interpretation of the Constant Force Tourbillon 11 Platinum, Arnold & Son pay tribute to the watchmaking genius of the House’s founder. This platinum edition represents the final opus of the Constant Force 11 collection – launched with the gold model – and crowns the celebration of 260 years of heritage.  It also celebrates the magic of nature with a dial ornamented with a hand-guilloché surface in the “tremblé” style, evoking the fern-covered moors around Tintagel in Cornwall – the birthplace of John Arnold and setting for the legendary adventures of King Arthur.

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Adorned with new refinements, the Constant Force Tourbillon 11 was purposefully designed by Arnold & Son to honour the timepiece that Abraham-Louis Breguet presented to John Roger Arnold in 1808. Now conserved by the British Museum, this historic timepiece, based on John Arnold’s No. 11 chronometer, is believed to be the first tourbillon-regulated watch made by Abraham-Louis Breguet after he filed the patent in 1801.

A fern-covered dial

The Constant Force Tourbillon 11 platinum edition features a distinctive solid gold dial. The fine detail of the “tremblé” is expertly crafted by hand with a burin engraver. Under the controlled motion of the tool, the sharp tip has traced a succession of artfully irregular zigzags. 

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This organic pattern is surprisingly harmonious and takes its inspiration from the wild moors of Cornwall, where ferns curl in fleeting arabesques as the sea winds blow. 

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Each etched curve seems to capture the soul of this mystical land, the birthplace of John Arnold and home to Arthurian legends.

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The engraving weaves a poetic tie between the master’s watchmaking heritage and the elemental forces that shaped his childhood. 

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The wind, the dancing ferns and the famous mists – all the magic of Cornwall – are reflected in the golden dial, transforming timekeeping into an ode to nature and history.

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The dial is meticulously pierced to accommodate the white opal hour and minute subdial, as well as the mechanism delivering constant force to the tourbillon cage. The latter can be seen under an 18-carat gold bridge and rotates in exact, one-second increments. 

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This rhythm is far from insignificant as it carries the legacy of marine chronometry when each second counted was a longitude reclaimed from the ocean.

A timekeeper’s testament

The classically shaped, rounded case measures 41.5 mm in diameter. Crafted in platinum, it appears exceptionally slender on the wrist. On the dial side, it is fitted with a delicate bezel framing a domed sapphire crystal with an anti-reflective coating on both sides.

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On the reverse, it features a sapphire case back through which the bridges and the tourbillon of the in-house manual winding A&S5219 calibre can be seen. 

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Water resistant to 3 bar, the watch is worn on a hand-stitched midnight blue alligator leather strap, fastened with a platinum folding clasp. 

A constant force mechanism

To ensure perfect isochronism throughout its 100-hour power reserve, Arnold & Son have positioned their patented constant force mechanism between the main gear train and the tourbillon. 

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Visible on the dial, this ingenious system regulates the energy from the barrels, eliminating any variations in torque that could disturb the balance’s oscillation. Second after second, it rearms a finely adjusted spiral guaranteeing a completely stable transmission of energy to the tourbillon cage. 

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The precise choreography of this constant force mechanism is magnified by an 18-carat gold bridge, emphasising the watchmaking excellence.

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The constant force mechanism replaces the group of components known as the “fusée-and-chain” that John Arnold used in his chronometers. The advantage of this system is that it not only delivers a constant force to the regulating organ, it also produces a true-beat seconds display. 

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The seconds are not indicated by a traditional seconds hand, but by the tip of the hand-blued anchor, which simultaneously serves as a structural bridge for the constant force mechanism.

A balanced tourbillon

This final limited series of 11 pieces pays tribute to the legendary friendship between John Arnold and Abraham-Louis Breguet.

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Its sapphire case back reveals the A&S5219 calibre, whose architecture is directly inspired by the first regulator with tourbillon created by Abraham-Louis Breguet. This chef-d'oeuvre, housed in the British Museum, was inspired by Arnold’s No. 11 chronometer and offered to his son in 1808. 

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The Constant Force Tourbillon 11 revives this watchmaking bond: its tourbillon cage faithfully reproduces the original design. With extremely pure lines, the tourbillon features a distinctive and remarkably delicate linear, mirror-polished and rounded cage bridge, revealing a variable-inertia balance whose design draws on John Arnold’s most accomplished chronometers.

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In this true dialogue across time, every component speaks to the extraordinary union of two masters of timekeeping.

A celebration of friendship 

The finishing of the main plate, bridge and tourbillon cock is virtually identical to that of the very first tourbillon.  

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To complete the tribute, Arnold & Son have included hand-engraved inscriptions on the barrel bridge and added the famous plate on which another homage has been engraved: “To the revered memory of John Arnold and Abraham-Louis Breguet. Friends in their time, legendary watchmakers always.”. This inscription definitively gives the Constant Force Tourbillon 11 its place in a unique historical saga: one in which the friendship between two geniuses gave rise to some of the most remarkable advances in chronometry. 

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TECHNICAL SPECIFICATIONS

Collection:  CHRONOMETRY

Model: CHRONOMETRY Constant Force Tourbillon 11 Yellow Gold Edition

Reference  1FCBX.Z01A.C0232X

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Movement
Calibre     A&S5219 hand-wound mechanical movement, constant force, one-minute tourbillon
Jewels    35
Diameter    33 mm
Thickness    10.48 mm
Power reserve    100 hours
Frequency    3 Hz / 21,600 vph
Finishes    
mainplate: 3N gold finish, grained, polished angles
    barrel bridge: 3N gold finish, grained, polished angles, stretched edges, hand engraving
    tourbillon bridge: gold finish, grained, polished angles, stretched edges, satin-finished Durnico steel retaining spring
     screws: gold finish, grained, polished angles, stretched edges, satin-finished Durnico steel retaining spring
    tourbillon: cage plate with mirror-polished finish, satin-finished pallet bridge,
mirror-polished stud holder, rhodium-plated balance, polished and rounded cage bridge
     constant force bridge: 18-carat yellow gold, polished bevel, satin-finished
flat surface, polished angles
    constant force carriage lower bridge: flame-blued, mirror-polished, polished angles.
Engraved plate    “To the revered memory of John Arnold and Abraham-Louis Breguet.
Friends in their time, legendary watchmakers always.” 
Functions    hours, minutes, true-beat seconds
Dial    18-carat yellow gold (3N), hand-engraved, Arnold & Son “fern” pattern 
Hour dial    white opal, concave
Case
Material    Platinum (Pt 950)
Diameter    41.5 mm
Depth    13.7 mm
Crystal    domed sapphire, anti-reflective coating on both sides
Case back    sapphire crystal, anti-reflective coating on both sides
Water-resistance    3 bar (30 metres/100 feet)
Strap
Material    midnight blue alligator leather with black alligator leather lining, hand-stitched
Buckle   folding, platinum (Pt 950)

🔰Edition -✅only ❱❱❱ 11 timepieces
🔴Swiss retail price CHF 140,600 excl. tax (subject to change)💰SOLD OUT ! ⚠️

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Press releases - 2026
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Switzerland
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ARNOLD & SON – LUNA MAGNA Platinum Dragon Verdite Edition

 

ARNOLD & SON – LUNA MAGNA Platinum Dragon Verdite Super-LumiNova 44mm Limited Edition 2026

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A platinum frame, a white gold body and a verdite base. Arnold & Son begins a new chapter of the Luna Magna collection with this sculpted dragon, undulating on a dial fashioned from an unusual ornamental stone. 

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Set in a 44-mm diameter case, this timekeeper is defined both by the power of its symbolism and the richness of its execution, combining artistic expression with mechanical mastery. 

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This limited edition of just eight pieces is inspired by the legend of the Dragon and the Pearl of Wisdom, interpreting it in a language of rarity, excellence and noble materials.

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The dragon snakes, undulates and circles. Engraved in white gold, it plays with the volumes, surfaces and geometry of the veined verdite dial of the Luna Magna Platinum. It coils around the white opal hours-and-minutes sub-dial before encircling the object of its desire: the large three-dimensional moon, the hallmark of all Luna Magna timepieces.

The heart of the story

In this, the dragon remains faithful to the legend that inspired it, while Arnold & Son gives it a dual role. Literally, the 12-mm sphere displays the phases of the moon with astronomical precision. 

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Composed half of white gold and half of verdite, it reproduces the visible lunar crescent without requiring correction for 122 years. Figuratively, it embodies the Pearl of Wisdom, the source of the dragon’s power, which it has lost and seeks to reclaim. It extends its sharp talons towards it… 

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This dragon  comes  from the Asian tradition: wingless, associated with water and with five claws on each foot – a sign of its imperial lineage.

On the surface

For the first time in the Luna Magna collection, Arnold & Son has deployed a real profusion of artistic savoir-faire. The verdite dial showcases rare and precious veining. Among the wide range of nuances offered by this stone, only the finest quality was selected for both the dial on which the dragon rests and the half-moon.

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The dragon itself is a work of art. Sculpted from a block of white gold, it has been meticulously hand-engraved with an exceptional level of precision, attention to detail and realism. Its scales, beard, crest, claws, and even its gaze, stand out in a striking relief that can only be achieved by the most skilled hands.

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The Maison’s signature hours-and-minutes sub-dial in white opal adds both a poetic and a functional dimension. Enhanced with luminescent material, it absorbs light and emits a soft glow in the dark, ensuring easy reading throughout the night in a subtle echo of moonlight.

Under the stone

The Luna Magna Platinum Dragon Verdite owes its astronomical and chronometric accuracy to the A&S1021 calibre. This manual winding movement is fully developed, machined, assembled and adjusted in house. Designed around the lunar globe, the calibre combines a 90-hour power reserve with a regulating organ beating at 3 Hz. On the case back, a secondary moon-age display with clearly marked graduations allows the moon phases to be set with great precision.

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The sophistication of this celestial mechanism also lies in its astronomical accuracy. Indeed, a complete lunar cycle lasts 29 days, 12 hours, 44 minutes and 2.8 seconds. Arnold & Son’s meticulous approach means that it would take 122 years for the display to drift by a single day from the actual lunar cycle provided the watch were kept fully wound. 

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The moon-phase function of the Luna Magna Platinum Dragon Verdite can be adjusted directly via the crown. A practical feature made possible by Arnold & Son’s total mastery of the watchmaking process.

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TECHNICAL SPECIFICATIONS

Collection:  LUNA MAGNA

Model:   LUNA MAGNA Platinum Dragon Verdite 44 Limited Edition

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Reference  1LMAX.Z05A.C1437C

Movement
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
Finishes:

• Mainplate: circular-grained
• Bridges: radiating Côtes de Genève, chamfered
• Wheels: circular-grained satin finish
• Screws: blued and chamfered, polished heads
• Moon-phase indicator: circular satin finish 

Functions  
Hours, minutes, astronomical lunar phases (one-day correction every 122 years),
moon phase indicator on case back
Dial 
material: verdite
Dragon: 18-carat white gold, hand-engraved
Hour dial: white opal added with Super-LumiNova
Flange: blue PVD coating
Moon
Diameter: 12.00 mm
Materials: verdite and 18-carat white gold
The visible crescent of the moon lights up at night thanks to the Super-LumiNova.
Case
Materia: Platinum Pt 950
Diameter: 44.00 mm
Thickness; 15.90 mm (with crystal)
Crystal: Domed sapphire with an anti-reflective coating on both sides
Case back: Sapphire crystal with an anti-reflective coating on the inside
Water-resistance 30metres / 100 feet
Strap 
Material: Alligator leather, greenr, black alligator leather lining
Buckle: pin, platinum Pt 950

  🔰Edition ✅Only ❱❱❱ 8 Pieces
 🔴Price: ✅ Swiss retail CHF 95,700 VAT (subject to change)💰

 

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Press releases - 2026
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Marketing & SalesBoulevard des Eplatures 38
CH – 2300 La Chaux-de-Fonds 
Switzerland
info@arnoldandson.com
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ARNOLD & SON – Nebula 40 Steel Ahmed Seddiqi 75th Anniversary Edition

ARNOLD & SON – CHRONOMETRY Nebula 40 Steel Ahmed Seddiqi 75th Anniversary Special Edition - 2025

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An exceptional skeleton timepiece

Arnold & Son and Ahmed Seddiqi celebrate the retailer’s 75th anniversary with a special edition, limited to 10 pieces and titled the Nebula 40 Steel, whose skeletonised calibre is impressive for its harmonious layout and distinctive style. 

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With a 40 mm steel case, remarkable finishes to the movement, and a unique abundance of technical details, this design is outstandingly elegant and powerful. The Nebula stands out from all other skeleton watches. Its structure embodies horology, and its style expresses unique elegance.

A visionary partner

Founded in Dubai in 1950, Ahmed Seddiqi has become a leading name for watches in the Middle East, embodying passion, know-how and legacy. The family-run retailer has built a unique heritage, bringing together the world’s major watchmakers and cultivating a role as an ambassador for fine watchmaking in the region. 

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This edition pays tribute to this story of excellence and celebrates the special relationship between Arnold & Son and the Seddiqi family.

Noble colours

This anniversary edition can be worn with a choice of three bracelets: three-link steel, garnet calfskin and technical fabric in the same colour. 

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The skeletonised main plate and gold-finished barrels complement the Eastern Arabic numerals on the garnet-hued flange. The palladium-plated bridges echo the steel of the case, creating an equilibrium between materials and colours.

Seven bridges

Designed with purity of line in mind, the Nebula 40 Steel features a rounded flank and deep lugs that highlight the essential: its signature movement. 

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Inspired by nebulae and their spiral arms, the architecture of the A&S5201 calibre is based on seven functional and harmoniously arranged skeletonised bridges. Facing the centre, they present a radiating and transparent symmetry that forms the collection’s essence. 

At the heart of the star

Beyond its dazzling appearance, the calibre is attractive for its precise finishes. The bridges, hollowed out and polished along all edges, present alternating satin-finish surfaces and shiny edges. Every single component contributes to creating a structured and steady rhythm. 

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On the case back, two intersecting ogival bridges support the functional organs, while the “Rayons de la Gloire” finish elegantly reflects Arnold & Son’s aesthetic.

Power and endurance

Equipped with two large series-coupled barrels, the Nebula 40 Steel offers a remarkable 90-hour power reserve, rare in skeletonised pieces but typical of Arnold & Son calibres. 

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Their energy drives the entire gear train, which follows the star-shaped arrangement of the bridges. The balance at the end beats at a frequency of 3 Hz, demonstrating this exceptional movement’s vitality.

A celebrated alliance

With this Nebula 40 Steel, Arnold & Son pays tribute to Ahmed Seddiqi’s 75-year existence, a symbol of watchmaking legacy and passion. 

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This limited edition embodies the encounter between two Houses united by the same ethos: that of excellence, creativity and promotion of fine timepieces. 

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 More than a watch, it seals an enduring bond between the Swiss Manufacture and its visionary partner in Dubai.

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TECHNICAL SPECIFICATIONS

Collection:  CHRONOMETRY

Model: CHRONOMETRY Nebula 40 Steel Ahmed Seddiqi 75th Anniversary Edition

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Reference: 1NEGS.U01A.K0243S

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Cas
    Material: Stainless steel
    Diameter: 40mm
    Thickness: 9.10 mm
    Crystal domed sapphire, double-sided anti-reflective coating
    Case back sapphire crystal, anti-reflective coating
    Water-resistance: 3 bar (30 metres /100 feet)
Dial and hands
    Skeletonised dial
    Garnet flange, gold-finish Eastern Arabic numerals 
Movement
    Calibre A&S5201
    Manual winding movement
    Diameter: 31.10 mm
    Thickness: 4.18 mm
    Frequency: 3 Hz, 21'600 vph
    Number of jewels: 24
    Power reserve of 90 hours 
Decoration
    main plate: gold finish, “Rayons de la Gloire” guilloché
    barrel covers: gold finish, sunray brushed
    bridges: palladium-plated, polished edges and satin-finished surfaces
    balance: rhodium-plated wheels: circular-grained and chamfered
    screws: chamfered, with mirror-polished heads
Functions/Indications
    Hours, minutes, small seconds
Strap and buckle
    Stainless steel, garnet calfskin or garnet technical fabric
    Buckle: stainless steel, folding clasp on steel bracelet and pin on leather and fabric strap

🔰Edition ✅Only ❱❱❱ 10 Pieces
🔴 Price:  101.000 AED (subject to change) / €23.620 incl. taxes (steel bracelet)💰

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Press releases - 2025
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Marketing & SalesBoulevard des Eplatures 38
CH – 2300 La Chaux-de-Fonds 
Switzerland
info@arnoldandson.com
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ARNOLD & SON – GLOBETROTTER 42 Steel Strand Blue & Greenwich Green Editions

ARNOLD & SON – GLOBETROTTER Steel 42 ‘Strand Blue’ & ‘Greenwich Green’ World-Time Chronometers Limited Edition 2025

 

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CONQUERING NEW WORLDS 

Arnold & Son is revisiting its Globetrotter collection to present a version that is at once more compact, slimmer and easier to read. With its new 42 mm diameter, the Globetrotter 42 Steel features a steel case and is available in two versions, one named ‘Strand Blue’, the other ‘Greenwich Green’, each available in a limited edition of 88 timepieces.

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“It is worth remembering that the English watchmakers John Arnold and his son John Roger were pioneers in the field of timepieces designed for travel and exploration. In 1771, their creations were tested at sea by Admiral Harland, then used successfully on ships as navigational instruments for calculating longitude. These instruments enabled British soldiers, explorers and scientists of the time to gain the upper hand over all their competitors. One such beneficiary was the explorer James Cook, who took John Arnold’s first chronometers (No. 1 and No. 2) on his second voyage of discovery between 1772 and 1775. Another example occurred in 1792 at the Cape of Good Hope in South Africa, when a John Arnold creation was entrusted by the Dutch to the French Rear-Admiral Antoine Bruny d’Entrecasteaux to help him with his search for the explorer Jean-François de Galaup, Comte de La Pérouse. Many of these instruments were also used on board the East India Company’s trading ships, or on vessels such as that commanded by Sir John Franklin during his third expedition to explore the Northwest Passage, an ice-free sea lane to Canada, in 1847.”

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In memory of those heroic times when explorers set out to discover the world clutching maps and chronometers, Arnold & Son presents a new version of its famous Globetrotter, a contemporary timekeeping instrument dedicated to today’s travellers. Revisited in size and functionality, the resulting Globetrotter 42 Steel has been finely reworked to offer dimensions that are more in line with modern wearing practices. Its 42 mm diameter steel case appears all the more balanced with its new thickness of just 15 mm, while the exceptional construction of its dial has been retained.

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This ultra-graphic dial has also undergone subtle changes that have made it visually more striking and technically even more effective for international travel. The structure retains its famous, delicately curved arched bridge – crafted from steel and worked by hand –which can be considered the signature feature of the collection. The bridge demarcates the hours of the day and night on the 24-hour bezel ring and, with the ruby set in its centre, holds in place the dome representing the northern hemisphere as seen from the North Pole. On the dome, the metallic continents, which have been sunray-brushed to accentuate their relief, stand out clearly and strikingly against the oceans depicted in blue or green depending on the model. 

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Another notable change made by the watch developers at Arnold & Son to this mobile dome – which rotates once every 24 hours and enables world time to be displayed – is the addition of a ring around its perimeter bearing the names of twelve reference cities. Each of these cities, from both the northern and southern hemispheres, is symbolised by its code placed opposite its location on the map. These indicators are intended to give texture to the planisphere and allow the user to instinctively visualise the time in the location of their choice, as it is read opposite the 24-hour transferred numerals on the fixed ring of the local time dial, which itself is read using the two arrows that peak out from under the world map. 

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The decision was also made to present the dials of both versions of the Globetrotter 42 Steel in classic English colours. This is a signature of the design and naming traditions that run through all Arnold & Son ranges. The ‘Strand Blue’ model is therefore a reference to the London street that runs parallel to the River Thames and on which John Arnold’s shop was located. The colours of the ‘Greenwich Green’ version were chosen to recall the wooded hills that surround the Royal Observatory in Greenwich. 

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Both versions of the Globetrotter 42 are powered by the in-house self-winding mechanical calibre reference A&S6122, whose power reserve has been increased from 45 to 55 hours. This movement allows the home and remote time displays to be adjusted via the three positions of the crown. 

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Like all movements bearing the Arnold & Son signature, it was entirely developed, produced, decorated, assembled, adjusted and cased up at the Manufacture in La Chaux-de-Fonds. Visible through the transparent sapphire crystal case back, the A&S6122 calibre features an engraved and finely openworked oscillating weight and is decorated with the traditional motifs of fine watchmaking. Its main plate is circular-grained, its bridges display radiating Côtes de Genève stripes, the wheels are satin-finished and the screws are chamfered and polished. 

 

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It should be noted that its palladium coating offers a particularly interesting light-grey finish that perfectly complements the cases of the models it powers. 

 

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These watches, with their sophisticated graphics and practical features for travellers, are worn on alligator leather straps in ‘ink’ blue or ‘Cornwall’ green depending on the model, and are fastened on the wrist with a classic stainless-steel pin buckle bearing the brand’s emblem.

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TECHNICAL SPECIFICATIONS

Collection   GLOBETROTTER

Model: Arnold & Son GLOBETROTTER 42 Steel Editions

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Reference: 1WTBS.K01A.C0263S - Strand Blue

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 Reference: 1WTBS.F01A.C1242S - Greenwich Green 

Movement
Caliber:  A&S6122
Manufacture Arnold & Son, self-winding mechanical
Jewels 29
Diameter 36.40 mm
Thickness 6.74 mm
Power reserve 55 hours
Frequency 4 Hz/28,800 vph
Movement decoration:

   Mainplate: circular-grained and palladium-treated
   Bridges:  ‘Rayons de la Gloire’ finish, chamfered, palladium-treated
   Wheels: circular satin-finished
   Screws: blued and chamfered, polished heads
   Oscillating weight: tungsten, engraved and skeletonised, palladium-treated
Functions
Hours, minutes, 3D World-time indication on the earth (24-hour display, 12 cities)

Dial

• 12-hour display: sunray-brushed, rhodium or green, blue or gold-finish Roman numerals
• 24-hour display: bead-blasted, rhodium or green, blue or gold-finish Arabic numerals

Case
Material: stainless steel, diameter 42 mm, 
Thickness: 15.10 mm under the arch
Crystal: domed sapphire, double-sided anti-reflective coating
Case back: sapphire crystal, anti-reflective coating
Water-resistant to 30m / 100 feet
Strap
Ink blue or Cornwall green alligator leather
Buckle: pin buckle, stainless steel

🔰Limited Edition 88 pieces
 

🔴Swiss retail price CHF 18,300 - incl. VAT (subject to change)
 

------------------------------
Press releases - 2025
-----------------------------
------------------------------------------
Marketing & Sales
Boulevard des Eplatures 38
CH – 2300 La Chaux-de-Fonds
Switzerland
info@arnoldandson.com
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www.facebook.com - Arnold and Son 1764
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www.Arnold&Son.com