Discover Arnold & Son Perpetual Moon 38 Gold Moonlight Dazzling Watch

Dazzling and aesthetically designed, the Arnold & Son Perpetual Moon 38 Gold honours Earth’s only permanent natural satellite with richness of detail, noble colour and radiant display.

Arnold & Son has housed its new astronomical moon-phase calibre in a 38mm red-gold case.  This indication is visible through the aperture of a gleaming blue mother-of-pearl dial.  The hour-markers, crown, lugs, and bezel are all illuminated by a sumptuous diamond setting. Glittering by day and scintillating by night, Perpetual Moon 38 Gold exudes radiance.

Arnold & Son is named after John Arnold, an 18th-century English watchmaker known for his ingenuity and work on marine chronometers. Arnold & Son continues his legacy by exploring contemporary interpretations of traditional watch craftsmanship. Arnold & Son develops its timepieces in-house, including its complicated calibres, from its Manufacture in La Chaux-de-Fonds, the cradle of the Swiss watchmaking industry.

Poetic and Radiant

The moon-phase complication is the most poetic and charmingly displayed watch function, but it is not the only one. Both in the sky and at Arnold & Son, the moon is large, influential, and powerful. It has an impact on our lives, oceans, gravity, and the appearance of our nights. This celestial body rules supreme on Perpetual Moon 38 Gold.

Perpetual Moon 38 Gold is adorned with 138 diamonds totaling 2.61 carats, but it remains firmly rooted in the La Chaux-de-Fonds Manufacture’s watchmaking codes, which are steeped in John Arnold’s marine chronometer heritage. As a result, this jewel also functions as a timepiece, thanks to a finely crafted manual-winding calibre.

The Spirit of Complications

Everything is based on the spirit of this complication. A large sky disc, also in mother-of-pearl, bears a white moon adorned with Super-LumiNova and hand-painted shadows beneath the delicately blue-tinged mother-of-pearl dial with an openworked upper section. The nearby constellations Ursa Major and Cassiopeia round out the scene.  As a result, Perpetual Moon 38 Gold has two faces. The first is the gem-set gold case with a mother-of-pearl dial that evokes the daytime. The other glows with a cold blue light to represent the night, when the luminescent stars shine and the moonlight truly comes into its own.

Perpetual Moon 38 Gold translates Arnold & Son’s exacting watchmaking standards into an entirely new women’s calibre, the smallest in its collection. The A&S1612 movement is 29.4 mm in diameter and 10.44 mm thick, and was designed to fit the new 38 mm diameter case. This manually wound movement with a 90-hour autonomy extends the range of Arnold & Son calibres with impressive power reserves.

Accuracy Assured

Arnold & Son pays homage to its iconic complication with this A&S1612 calibre, which features a large moon disc. The various crescents displayed between 10 a.m. and 2 p.m. faithfully recreate the appearance of the Earth’s satellite. Arnold & Son has ensured that this moon-phase timepiece will remain accurate for 122 years. Thus when kept constantly wound, it would take more than a century for the moon on the timepiece to experience a time lag with its real-life counterpart in the sky.

Perpetual Moon 38 Gold – Technical specifications

Functions: hours, minutes, astronomical moon phases


    • Calibre – A&S1612, mechanical with manual winding
    • Jewels 24
    • Diameter 29.40mm
    • Thickness 4.95mm
    • Power reserve 90 hours
    • Frequency 3Hz / 21,600vph
    • Finishes main plate: rhodium-plated, Côtes de Genève stripes radiating from the centre bridges: polished and chamfered wheels: circular satin-finished screws: blued and chamfered, polished heads

Dial blue-tinted mother-of-pearl, hour-markers set with 36 diamonds

Moon phases sky: mother-of-pearl tinted with gradated shades of blue moon: mother-of-pearl with Super-LumiNova and hand-painted details constellations: hand-painted, with added Super-LumiNova


    • Material 18-carat red gold (5N), set with 80 brilliant-cut diamonds
    • Diameter 38mm
    • Thickness 10.44mm
    • Crystal domed sapphire, with an anti-reflective coating on both sides
    • Case back sapphire crystal, with an anti-reflective coating
    • Water-resistance 30metres / 100feet


    • Material satin-feel blue alligator leather
    • Pin buckle 18-carat red gold (5N), set with 22 brilliant-cut diamonds
    • Diamonds total weight: ~2.61 carats colour: D-E-F clarity: IF-VVS

Edition unlimited

Reference 1 GLMR.U01A.C206A

Swiss retail price CHF 48,500 including taxes (may be subject to modifications)

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