Luna Magna

Reference: 1LMAR.A02A.C153A
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Limited Edition: 28 pieces
Case: 18-karat rose gold
Size: 44mm
Movement: hand-wound manufacture caliber A&S1021
Function: three-dimensional astronomical moon phase with age-of-the-moon indicator on the backside
Power Reserve: approximately 90 hours
Water Resistance: 30m
Dial: white lacquer with aventurine glass base plate; 12mm moon with white marble and aventurine glass halves
Hands: blued steel
Caseback: sapphire crystal
Strap/Bracelet: hand-stitched alligator leather
Factory Warranty: two years


Luna Magna features Arnold & Son’s first 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-centered 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.

Presented in a 44mm rose gold case, Arnold & Son has recreated one of its distinctive designs. The off-centered hours and minutes dial at 12 o’clock frees up substantial space for displaying complications, such as this spherical moon measuring 12mm 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.

Luna Magna is driven by the A&S1021 caliber, which has been fully developed, manufactured, assembled, and adjusted in the manufacture. This new hand-wound caliber, 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 age of the moon on the caseback side. Its clearly readable markings are designed for high-precision adjustments.