The Hermès Arceau L’Heure de la Lune (ref. AR1.890F) reimagines traditional moonphase displays through an unorthodox, poetic arrangement. Two floating subdials – one for time and one for date – rotate over a pair of detailed moon discs positioned at 12 and 6 o’clock, simultaneously showing lunar phases in both hemispheres.

Housed in a 43mm white-gold case, the watch features a black aventurine dial whose subtle sparkle evokes a starlit sky. Beneath, Hermès deploys the calibre H1837 with a proprietary L’Heure de la Lune module developed by Chronode, offering a 42-hour power reserve. The rotating disc mechanism completes a full cycle every 59 days, tracking lunar progress with mechanical precision. Water-resistance is rated to 30 metres.

Ref. AR1.890F stands as one of the most distinctive moonphase watches in contemporary haute watchmaking, its inverted layout and celestial detailing blending poetry and engineering in equal measure.