Demonstrating its rich British history and high-end Swiss craftsmanship, Arnold & Son presents the HM Perpetual Moon with a blue aventurine quartz dial, preserving the House’s expertise in astronmical complications.

The timepiece with blue guilloché moon phase disc and engraved moon houses the exclusive Arnold & Son mechanical hand-wound calibre A&S1512 exclusively developed for the moon phase complication and equipped with a double barrel to yield a 90-hour power reserve. This movement powers a most accurate moon phase with one day’s deviation every 122 years and offers a unique easy-to-set feature thanks to the addition of a second moon indicator. This second moon display, visible through the transparent case back, features a graduated dial and a pointer hand allowing an accurate setting.

Aesthetically, the moon phase guilloché disc, running from 10 o’clock to 2 o’clock, reveals a 11.2 mm solid 18k red gold engraved moon. Hands of hours and minutes are faceted and run along twelve golden applied indexes of the blue aventurine quartz dial. The model has an anti-reflective sapphire crystal. The HM Perpetual Moon Aventurine 18 karats red gold case measures 42mm diameter is adorned with a hand-stitched alligator strap.