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Face up photo of Luna Magna Red Gold

Luna Magna Red Gold

In a starry sky, a large moon alternates between light and dark as it moves through its phases.

Limited to 28 pieces.

The volume of the moon

Showcased on an aventurine glass dial, the moon changes majestically and with astronomical precision. It is the largest rotating moon ever built into a wristwatch, and a creation that benefits from the first- class watchmaking and decorative techniques of the Arnold & Son Manufacture.

Luna Magna features Arnold & Son’s three-dimensional moon. With this original timepiece, the Swiss watchmaker with English roots aims to make a lasting impression by presenting the largest rotating moon ever created in relief for a wristwatch. Beneath an off-centred dial at 12 o’clock, which constitutes one of the house’s aesthetic signatures, Arnold & Son has placed a rotating sphere that accurately represents the appearance of the quarters of the moon against a starry backdrop that is more dazzling than a midsummer night sky.

CHF 49,800
incl. VAT
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Technical Specifications

Reference: 1LMAR.A04A.C211A
hours, minutes, astronomical moon-phase, moon-phase indicator on the back
37.60 mm
12.00 mm with three-dimensional moon (4.75 mm without moon)
Power reserve:
90 hours
3 Hz / 21,600 vph
blue aventurine glass
white mother-of-pearl
Moon phases
12.00 mm in diameter, white marble and aventurine glass
18K red gold 5N
44 mm
15.90 mm
domed sapphire, with an anti-reflective coating on both sides
sapphire crystal, with an anti-reflecting coating
Water resistance:
3 bar (30 metres/100 feet)
blue alligator leather, sky blue alligator leather lining, hand-stitched
pin buckle, 18K red gold (5N)

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Photo of Luna Magna Red Gold


Presented in a 44 mm red-gold case, Arnold & Son has recreated one of its distinctive designs. The off-centred hours and minutes dial at 12 o’clock frees up substantial space for displaying complications, such as this spherical moon measuring 12 mm in diameter. Its size is not its only distinctive feature. Half of the moon is made of marble to represent the illuminated part of the Earth’s satellite, while the other half is made of aventurine glass to depict the darker side. Neither material has ever been used in a three-dimensional design such as this. Changing from dazzling white to a deep, starry blue, the Luna Magna’s quarters have been delicately depicted to replicate the appearance of the lunar disc.

Photo of Luna Magna Red Gold


The large moon emerges from the main plate of the A&S1021 calibre without upsetting the overall balance of the timepiece. Arnold & Son has drawn on its remarkable creativity to make Luna Magna a well-proportioned watch that showcases the incredible volume of its moon. The lunar globe thus appears halfway up the movement, perfectly positioned between the top and bottom. The upper part is encased in a glass box. This technique has been repeated on the case-back side, where the sapphire crystal rests on the wrist. By placing most of the volume in these sapphire crystals, the Luna Magna’s case has a total height of 15.9 mm. Lastly, to bring the overall piece together, the deeply tapered lugs extend the curvature of the sapphire crystal to meet the natural curve of the wrist.

Photo of Luna Magna Red Gold


Arnold & Son has an ancient, long-standing relationship with the phases of the moon. Guided by the life of John Arnold and the mark he made in the Royal Navy during the 18th century, the house has frequently endeavoured to depict the age of this satellite as accurately and as beautifully as possible. By completely reinventing the way the Earth’s satellite is depicted, Luna Magna elevates itself by pushing the boundaries of this astronomical and poetic watchmaking exercise.