Perpetual Moon
Showcasing one of the largest moons in the watchmaking sphere, Perpetual Moon stands out for its complication and Arnold & Son’s aesthetic approach.
3d rotating moon
Luna Magna features a three-dimensional moon. With this original timepiece, the Swiss watchmaker with English roots makes 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 moon’s quarters.
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off-centered indications
Presented in a 44 mm 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. 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 sapphire crystal’s curvature to meet the wrist’s natural curve.
in-house calibre
Luna Magna is driven by the A&S1021 calibre, which has been fully developed, manufactured, assembled, and adjusted in the Manufacture. This new hand-wound calibre, designed with the lunar globe in mind, features a 90-hour power reserve and a regulating organ oscillating at a frequency of 3 Hz. The movement also includes a secondary display detailing the moon’s age on the case-back side. Its clearly readable markings are designed for high-precision adjustments.
floating moon
The large moon emerges from the calibre’s main plate without upsetting the timepiece’s overall balance. Arnold & Son has drawn on its remarkable creativity to make Luna Magna a well-proportioned watch that showcases the incredible volume of its moon. Thus, the lunar globe 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.
astronomical precision
The sophisticated celestial mechanics are also based on precise astronomical reality. In fact, a complete lunar cycle lasts 29 days, 12 hours, 44 minutes and 2.8 seconds. Arnold & Son has managed to replicate it so that it will take 122 years for the movement’s display to deviate from the correct celestial reading by one day. The correction required at this time will be easy to dispense, as the Luna Magna’s moon-phase function can be accessed directly by the crown. Arnold & Son’s total mastery of the watchmaking process has made this practical feature possible.
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