Front view
Dial, hands and bezel as delivered.
Case-back view
Case-back engraving and, where fitted, the sapphire display.
Movement
Calibre with its finishing and decoration.
On the wrist
Worn shot for proportion and strap drape.
Arnold & Son · Constant Force
Arnold & Son Constant Force 39 mm Mother-of-pearl Carbon
Reference 62952OR.79
Reference at a glance
- Brand
- Arnold & Son
- Collection
- Constant Force
- Model
- Arnold & Son Constant Force 39 mm Mother-of-pearl Carbon
- Reference number
- 62952OR.79
- Year / era
- 1972 · 1970s — quartz-crisis era
- Complication
- Moon phase
- Movement
- In-house automatic with 22k gold rotor
- Case material
- Carbon TPT
- Dial type
- Mother-of-pearl
- Strap / bracelet
- Oyster bracelet
- Water resistance
- 50 m
- Limited-edition status
- Limited edition of 100 pieces
Case, dial & bracelet
- Case dimensions
- 39 mm
- Case thickness
- 14.1 mm
- Case material
- Carbon TPT
- Bezel
- Bidirectional 24-hour Cerachrom
- Crystal
- Box sapphire with AR coating
- Dial
- Mother-of-pearl
- Hands
- Faceted dauphine hands, polished by hand
- Indexes
- Applied faceted white-gold indexes
- Bracelet / strap
- Oyster bracelet
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 50 m
Movement
- Movement / calibre
- Calibre 20E — In-house automatic with 22k gold rotor
- Movement type
- Manual-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 5 days
- Number of jewels
- 31 jewels
- Complications
- Moon phase
- Functions
- Flying tourbillon, power reserve
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 1972 – 1987
- Limited-edition quantity
- 100 pieces
- Current market information
- Consistently trades above retail; waiting lists at authorised dealers remain long.
Designer
Emmanuel Gueit
Emmanuel Gueit came from a family of Geneva jewellers and was barely into his twenties when he drew the oversized Royal Oak Offshore in 1993 — a watch the house's traditionalists resisted and collectors turned into an icon.
Historical significance
Arnold & Son Constant Force 39 mm Mother-of-pearl Carbon sits within Arnold & Son's Constant Force line, introduced in 1972. It carries the house codes established since 1764 — carbon tpt case, mother-of-pearl dial and in-house automatic with 22k gold rotor — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- The movement's bridges are decorated even where they will never be seen once the watch is cased.
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
The House
Arnold & Son
Brand facts
- Founding year
- 1764
- Founder
- John Arnold
- Headquarters
- United Kingdom
- Tier
- Ultra-Luxury & Haute Horlogerie
- Major collections
- Perpetual Moon, Luna Magna, DSTB, Nebula, Globetrotter, Constant Force
- Signature technologies
- In-house hairspring production · Hand-applied guilloché dials · Proprietary case-hardening and polishing
- Famous movements
- In-house tourbillon, manual-winding · In-house manual-winding, hand-finished · In-house automatic micro-rotor · In-house automatic with 22k gold rotor
- Notable watches
- Arnold & Son Perpetual Moon 44 mm Silvered Stainless (1988) · Arnold & Son Perpetual Moon 39 mm Black Stainless (2001) · Arnold & Son Perpetual Moon 44 mm Ice Quartz (1968) · Arnold & Son Perpetual Moon 36 mm Skeletonised Carbon (1950)
Brand history
Arnold & Son has spent more than 262 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Perpetual Moon, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
John Arnold established Arnold & Son in 1764, working from United Kingdom at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Arnold & Son calibre produced today.
Historical milestones
1764
John Arnold founds Arnold & Son in United Kingdom.
1804
Arnold & Son earns its first international recognition for precision timekeeping.
1969
The quartz era forces Arnold & Son to redefine mechanical watchmaking.
1990
Arnold & Son enters the modern collector market with its signature lines.
2024
Arnold & Son continues to produce Perpetual Moon, Luna Magna, DSTB and other icons in limited numbers.
More Constant Force
Arnold & Son Constant Force 42 mm Salmon 18k
Ref. 33806OR.57
Arnold & Son Constant Force 44 mm Salmon 18k
Ref. 56903OR.61
Arnold & Son Constant Force 42 mm Blue Stainless
Ref. 97877ST.12
Arnold & Son Constant Force 37 mm Mother-of-pearl 18k
Ref. 40085OR.90
Arnold & Son Constant Force 43 mm Salmon 18k
Ref. 91202OR.90