Arnold & Son / HM Perpetual Moon
Arnold & Son HM Perpetual Moon
Collection profile
Arnold & Son Perpetual Moon is the brand's astronomy-focused moon-phase collection, spanning 41.5 mm and 38 mm precious-metal references with large moon displays.
Why it matters
Perpetual Moon is one of Arnold & Son's signature astronomy lines, using a large moon-phase display to connect the brand's modern watchmaking to navigational heritage.
Key references
Collection timeline
- 2024 — Arnold & Son’s current Perpetual Moon collection page presents the line as an active astronomy collection spanning 41.5 mm and 38 mm models in red gold, platinum, white gold, and special editions.
- 2024 — Perpetual Moon 41.5 Red Gold ‘Cliff Grey Edition’ was launched as a limited edition of 28 pieces with the hand-wound A&S1512 calibre.
- 2024 — Perpetual Moon 41.5 Platinum ‘Fern Green’ was introduced as another 28-piece limited edition, showing ongoing expansion of the collection through color and material variations.
- 2024 — The collection also included smaller 38 mm executions such as Perpetual Moon 38 White Gold ‘Night Tide’, indicating the line’s split between larger unisex/classic pieces and gem-set 38 mm variants.
FAQ
What defines Arnold & Son Perpetual Moon?
The collection is defined by a large astronomical moon-phase display and manufacture calibres in precious-metal cases.
Does Perpetual Moon come in different sizes?
Yes. Arnold & Son's official collection shows 41.5 mm and 38 mm Perpetual Moon references.
More from Arnold & Son
- UTTE (Ultra Thin Tourbillon) — Arnold & Son’s UTTE, now presented as Ultrathin Tourbillon, is the brand’s ultra-thin flying tourbillon family, first launched in 2013 and defined by an off-centred display, marine-chronometer-inspired layout, and one of the slimmest hand-wound tourbillon calibres of its era.
- Constant Force Tourbillon
— Arnold & Son’s Constant Force Tourbillon line is a chronometry-led high-complication family combining a patented constant-force mechanism, dead-beat seconds and a tourbillon regulator, explicitly tying modern wristwatch construction to John Arnold’s marine-chronometer legacy and his historical link with Abraham-Louis Breguet. - TB88 — The TB88 is Arnold & Son’s 2012 deadbeat-seconds chronometer, named for its symmetrical “double eight” architecture and built as a modern wristwatch tribute to English marine chronometer construction associated with John Arnold.
- Longitude — Longitude is Arnold & Son’s chronometry-led sports watch family, explicitly inspired by John Arnold’s marine chronometers and the historical quest to calculate longitude at sea, with COSC-certified manufacture movement A&S6302, a 42.5 mm titanium case, and power-reserve plus large small-seconds display.