Shopping Cart

Perpetual Moon 41.5 Platinum, Fern Green edition - Clear Skies

NOVEMBER 15 2024    |    Novelties

Moonlight illuminates a botanical green dial. The “Fern Green” version of Perpetual Moon 41.5 borrows the cool tones of the moon. The paleness of the platinum, the freshness of the fern green, and the midnight blue of the sky create an original flow of colours.

Maturity, diversity and mechanical exclusivity: the Perpetual Moon collection is constantly being enriched with new creations, consistently reaffirming the watchmaking and artistic talents of Arnold & Son. Following two other editions, one with salmon pink accents and another in sky blue, Perpetual Moon 41.5 Platinum is now available in this limited fern green version of 28 timepieces.

Its hue is inspired by the unique colour of the fern, an undergrowth plant found in abundance in the English gardens of Cornwall, the county where John Arnold was born.

 

Shimmering
The “Stellar Rays” finish enlivens the dial with a sophisticated shimmer. This aesthetic is achieved through cleverly irregular engraving. Various depths and widths of rays coexist and follow on from one another, creating a unique rhythm. Their succession produces a fluctuating play of light, accentuated by the depth created by several layers of transparent lacquer.

Realistically depicted and set against a grained sky with a midnight blue PVD treatment, the large white mother-of-pearl moon is also overlaid with Super-LumiNova. Invisible by day, this added colour gives it a whole new face by night.

Compass
Following in the tradition of the Perpetual Moon collection, the moon is surrounded by Ursa Major and Cassiopeia, both hand-painted and overlaid with luminescent material. The choice of these star patterns is an allusion to the history of marine chronometer-maker John Arnold.

These two constellations have always served as landmarks in the night sky. Halfway between the two easily identifiable groups is Polaris. Its position always shows the north and its elevation angle can be used to estimate the distance from the equator, i.e. the latitude. Before the invention of instruments to determine the longitude, it was the most reliable measure of a ship’s position at sea.

Accuracy
On the case back, a secondary display of the phases of the moon allows fast and accurate adjustment of the moon age. The manually-wound A&S1512 calibre that powers it is able to track its phases with exceptional accuracy. The total duration of a lunar cycle is 29 days, 12 hours, 44 minutes and 2.8 seconds. Arnold & Son has approached this so closely that it would take 122 years for this movement, if constantly wound up, to accumulate a 24-hour discrepancy between the display and astronomical reality.

Like all Arnold & Son’s movements, the A&S1512 calibre was entirely developed, produced, decorated, assembled, adjusted and cased up at the manufacture in La Chaux-de-Fonds. This calibre uses two barrels and has an oscillation frequency of 3 Hz, giving a 90-hour power reserve.

 

Perpetual Moon 41.5 Platinum, Fern Green edition

Technical specifications

 

                                       

Functions     hours, minutes, astronomical moon phases, second moon-phase indicator on the back
     
Movement      
Calibre   A&S1512, mechanical with manual winding
Jewels   27
Diameter   34 mm
Thickness   5.35 mm
Power reserve   90 hours
Frequency   3 Hz/21,600 vph
Decoration   mainplate: rhodium-plated, radiating Côtes de Genève stripes
    bridges: polished and chamfered
    wheels: circular satin-finished
    screws: blued and chamfered, polished heads
    second moon-phase indicator: rhodium-plated and circular-grained
     
Dial   “Stellar Rays” decoration, fern green PVD treatment
     
Moon phases   sky: grained, with midnight-blue PVD treatment
    constellations: hand-painted, enhanced with Super-LumiNova
    moons: mother-of-pearl discs enhanced with Super-LumiNova, hand-painted details
     
Case    
Material   platinum (Pt 950)
Diameter   41.5 mm
Depth   11.30 mm
Crystal   domed sapphire with an anti-reflective coating on both sides
Case back   sapphire crystal, anti-reflective coating
Water-resistance   3 bar (30 m/100 ft)
     
Strap    
Material   Cornwall green alligator leather, crimson-purple alligator leather lining
Buckle   pin buckle, platinum (Pt 950)
     
References   1GLBX.F01A.C285X
     
Limited edition   28 timepieces

 

 

                                           


Related Articles

OCTOBER 07 2025    |    Novelties

A Week in Blue: The One Week Manufacture Edition Blue

Armin Strom unveils the One Week Manufacture Edition Blue, a bold evolution of its foundational calibre, now reimagined in a striking deep blue. Limited to just 100 pieces, this timepiece reflects the brand’s dedication to mechanical artistry and uncompromising craftsmanship.

A Sculptural Expression of Precision
Encased in a 41 mm stainless steel case and paired with an integrated steel bracelet, the watch features a fully openworked architecture. The traditional dial is replaced by a blue PVD-coated mainplate, creating a vivid stage for the movement’s choreography. Every component is arranged in perfect symmetry, emphasizing depth, contrast, and clarity.

Engineered for Endurance
At its core is the manual-winding Calibre ARM21, developed and assembled entirely in-house. With dual barrels in series, it delivers a full seven-day power reserve and operates at 3.5 Hz for enhanced stability. A standout feature is the three-dimensional power reserve indicator, driven by a conical gear and polished cone — a nod to traditional pocket watches.

Each movement is hand-finished to haute horlogerie standards, with Geneva stripes, polished bevels, and chamfered edges. Every piece is assembled twice, ensuring flawless performance and visual harmony.

View Watch Gallery
Image 1 Image 2  
View More
NOVEMBER 05 2024    |    Novelties

A platinum bracelet for the most refined sporty timepiece

Featuring a platinum case and bracelet with an 18k white gold movement and dial, C by Romain Gauthier Platinum Edition Bracelet resonates with the most discerning collectors in the watchmaking world. Romain brings a touch of refinement to this timepiece with a sporty profile and assertive character, a combination of noble materials that reveals a traditional side to this very modern timepiece.

The C by Romain Gauthier Platinum Edition Bracelet stands out for its elegance and ultimate level of refinement, beyond the precious character that platinum brings, the bracelet design highlights the textures and finishing techniques that make this timepiece more luminous and prestigious.

In keeping with Romain's vision - The Evolution of Tradition - the bracelet requires a high level of craftsmanship and hand finishing. Each link is composed of high polished and satin brushed surfaces by hand, highlighting the interplay of light and reflecting the artistry and technical nature of the bracelet and the piece in general.

Conceived as an integral element of the whole timepiece, the bracelet was designed to be one with the case - “The bracelet is the case, and the case is the bracelet” says Romain. This desire is reflected in the fusion of these two elements that cannot be dissociated. Inspired by the finger bridges style, the design of the movement follows the watchmaking history of the Swiss Vallée de Joux, with a modern approach, reflecting Romain's vision of the evolution of tradition.

As a non-limited edition, the Platinum Edition Bracelet can be personalized and customized to reflect each collector’s personality and taste.

View More
AUGUST 26 2025    |    Novelties

Armin Strom Unveils Tribute 1 Sandstein: A Timeless Homage Cast in Sandstone

Drawing inspiration from the natural beauty and architectural heritage of Burgdorf, Armin Strom introduces the Tribute 1 Sandstein, a limited edition timepiece that blends Swiss tradition with modern refinement. With only 50 pieces available globally, this elegant watch pays tribute to the region’s iconic sandstone and the brand’s artisanal roots.

Encased in a 38 mm stainless steel case with alternating brushed and polished finishes, the Tribute 1 Sandstein features a warm sand-toned off-centre dial adorned with a grain d’orge guilloché pattern and Roman numerals. A frosted subdial and matching sand Alcantara strap complete the harmonious design.

At its heart beats the in-house Caliber AMW21, a hand-wound movement offering an impressive 100-hour power reserve. The visible motor barrel, held by a mirror-polished finger bridge, adds a modern technical flair while honoring traditional Swiss watchmaking values.

Through sapphire crystals on both sides, the movement reveals Armin Strom’s signature hand-finishing: hand-bevelled bridges, black-polished screws, Geneva stripes, and circular graining. Each watch is assembled twice, ensuring mechanical precision and aesthetic integrity.  

View Watch Gallery
Image 1 Image 2  
View More
APRIL 07 2026    |    Watches and Wonders 2026

The HM Pietersite: A Tribute to the Spirit of Exploration and the Art of the Ultra-Thin

Arnold & Son presents two new evocative versions of its ultra-thin HM model, featuring dials crafted from Namibian pietersite. Often called the "stone of storms," this decorative mineral belongs to the chalcedony family and was first discovered by Sid Pieters in the early 1960s. Each unique dial displays delicate, swirling patterns that recall the turbulent skies and foaming waves of Cornwall, the English birthplace of founder John Arnold. This design pays tribute to the ingenuity of the legendary watchmaker while celebrating the spirit of those who maintain their course in a challenging world.

The designation "HM" was intentionally chosen to reflect the watch's focus on displaying only hours and minutes, while simultaneously serving as a historical nod to the British Royal Navy. In naval tradition, HM stands for "His or Her Majesty’s," a title that appeared in the 17th century and was later formalized as HMS. By transposing this reference to watchmaking, Arnold & Son connects the precision of modern horology with England's maritime history, specifically the era when John Arnold’s marine chronometers enabled the exploration of new lands.

Encased in a choice of 18-carat red gold or stainless steel, the HM Pietersite is a masterpiece of elegance and restraint. The case measures a refined 39.5 mm in diameter with a remarkably slim profile of just 7.82 mm. To complement the dreamlike, diaphanous patterns of the pietersite dial, the timepiece is paired with a matte ink-blue alligator leather strap and a traditional pin buckle crafted from the same metal as the case. These limited editions are produced in extremely small quantities, with only 8 pieces available in red gold and 18 in steel.

At the heart of this timepiece lies the ultra-thin, in-house A&S1001 manual-winding calibre. Visible through a sapphire crystal case back, the movement is a showcase of luxury finishing, featuring a rhodium-plated main plate with circular graining and bridges adorned with radiating Côtes de Genève. Despite its slender height of only 2.70 mm, the movement offers exceptional performance with a generous 90-hour power reserve. Every detail, from the snail-finished wheels to the blued screws with polished heads, reflects the most exacting standards of Swiss watchmaking.

View Watch Gallery  
Image 1  Image 2 Image 3  Image 4       
View More
ENDLESS DISCOVERY IN YOUR INBOX
Join our mailing list to receive insider updates on our latest collections, invites to private events, and other personalized offerings.