The Perpetual Moon is one of Arnold & Son’s signature pieces.

Distinguishable by its expansive moonphase display and stunning guilloché dial, the Perpetual Moon demonstrates the brand’s ability to create watches that, on the surface appear simple, but are much more detailed and complicated when studied up close.

This particular piece features a 41.5mm 18k rose gold case with a stepped bezel, a moon phase corrector pusher at 2 o’clock and a signed crown. The blue sunray guilloché dial features Arnold & Son’s signature oversized moonphase disc with a luminous mother of pearl moon and decorative constellations, a set of applied rose gold indices and a matching stylized handset.

Visible through a sapphire display back is the beautifully finished, hand-wound Calibre A&S1512 equipped with 90 hours of power reserve and the inner workings of its moonphase complication that is accurate for 122 years. This timepiece is in virtually brand new condition, and comes fitted to a blue alligator strap with a signed 18k rose gold pin and buckle. It also includes its inner and outer box set and blank Certificate of Origin papers.

With a perfectly sized case, a dial and movement with hidden details aplenty and a hand-painted, luminous moonphase display — this is the way to fully enjoy horology's most whimsical complication!