The Perpetual Moon 38 Red Gold by Arnold & Son features a 38 mm red gold case with a blue aventurine dial that simulates a starry sky. Equipped with the A&S1612 caliber with manual winding and a power reserve of 90 hours, it stands out for its precise moon phase, which loses only one day every 122 years. This model fuses elegance, precision and the brand’s watchmaking heritage.