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For Immediate Release

Arnold & Son Unveils Perpetual Moon 38 ‘Mintnight’ Timepiece at Geneva Watch Days 2023


New York (August 29, 2023) – At the 2023 edition of Geneva Watch Days, Arnold & Son revealed a poetic new women’s moonphase complication timepiece. The Swiss watchmaker unveiled the Perpetual Moon 38 Mintnight, a limited edition of 18 pieces, with a hint of mint green and a splendid moon rendered in diamonds, mother-of-pearl, and ruthenium crystals. 

From its very first appearance, the Perpetual Moon 38 was destined to rise. Its latest iteration, ‘Mintnight’, showcases the night in shades of mint green, turquoise, teal, and sky blue. A gentle gradation of colored mother-of-pearl adorns this limited edition of 18 timepieces. The mother-of-pearl’s opalescent sheen is complemented by the shimmer of the ruthenium moon and dial foreground, together with the diamonds that sparkle on the bezel, lugs, and hour-markers of this poetic creation.


Measuring 38 mm in diameter and 10.44 mm thick, the case of the Perpetual Moon 38 Mintnight is fashioned from a block of white gold. Its bezel, four lugs, and crown host a total of 80 brilliant-cut diamonds. When added to the 22 diamonds adorning its buckle, they amount to a total weight of 2.57 carats. These gemstones pave the way for the lavish dial ornament of this delicate complication by Arnold & Son.

Behind a wave of ruthenium crystals, a maze of blue, mint-green, and turquoise earthen hills emerge one after the other before receding towards the horizon. The sky above this scene, scattered with hand-painted stars, is filled with an immense moon. Its surface, also made from ruthenium crystals, illuminates the sky. The use of this rare material has become a special signature of Arnold & Son, adding preciousness, light, and texture. Five marquise-cut diamonds indicating the hours bring a glittering finishing touch to this timely work of art.


The Perpetual Moon 38 Mintnight transposes the high watchmaking standards that have always guided Arnold & Son into the world of ladies’ timepieces. The Swiss manufacture thus created a specific caliber, the smallest in its collection, specifically for the Perpetual Moon 38.

The proportions of the A&S1612 caliber, which measures 29.4 mm, were designed with the case in mind. This manually wound movement – with an autonomy of 90 hours – perpetuates the range of Arnold & Son calibers with impressive power reserves.


The emblematic complication of the A&S1612 caliber is its moon phase. The Perpetual Moon 38 Mintnight houses a large moon disc with its various crescents occupying the wide window situated between 10 and 2 o’clock, cut out to faithfully depict the appearance of the Earth’s natural satellite.

Staying true to its tradition as a precision watchmaker and its legacy of high-sea navigation, Arnold & Son has ensured that this moon-phase timepiece will remain accurate for 122 years. This means that, if kept constantly wound, it would take more than a century for the moon on the timepiece to experience a one-day time lag with its real-life counterpart in the sky.

For more information, contact Ana Martins Communications.


Named after John Arnold, English watchmaker of the 18th century renowned for his ingenuity and work on marine chronometers, Arnold & Son perpetuates today his legacy, exploring contemporary ways to interpret traditional watch craftsmanship. From its Manufacture based in La Chaux-de-Fonds, cradle of the Swiss watchmaking industry, Arnold & Son develops its timepieces in-house including its complicated calibers.

The House established iconic collections such as the Time Pyramid with its unique architecture, the Nebula featuring a fully skeletonized movement, the Perpetual Moon and the Luna Magna displaying among the most spectacular moon phases on the market or the Globetrotter, impressive three-dimensional worldtimer. The twenty plus calibers 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.

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