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.
Corum · Coin Watch
Corum Coin Watch 44 mm Blue Carbon
Reference 31165OR.72
Reference at a glance
- Brand
- Corum
- Collection
- Coin Watch
- Model
- Corum Coin Watch 44 mm Blue Carbon
- Reference number
- 31165OR.72
- Year / era
- 1970 · 1970s — quartz-crisis era
- Complication
- Moon phase
- Movement
- Automatic chronograph
- Case material
- Carbon TPT
- Dial type
- Blue "Grande Tapisserie"
- Strap / bracelet
- Integrated steel bracelet
- Water resistance
- 150 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 44 mm
- Case thickness
- 9.4 mm
- Case material
- Carbon TPT
- Bezel
- Baguette diamond rainbow
- Crystal
- Sapphire with internal AR treatment
- Dial
- Blue "Grande Tapisserie"
- Hands
- Skeletonised sword hands, white luminescent
- Indexes
- Applied Roman numerals
- Bracelet / strap
- Integrated steel bracelet
- Clasp / buckle
- Folding clasp in matching case metal
- Water resistance
- 150 m
Movement
- Movement / calibre
- Calibre 74B — Automatic chronograph
- Movement type
- Automatic, self-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 65 hours
- Number of jewels
- 37 jewels
- Complications
- Moon phase
- Functions
- Hours, minutes, small seconds
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 1970 – 1986
- Limited-edition quantity
- Not applicable
- Current market information
- Values have stabilised after the 2022 correction; condition and box-and-papers drive the premium.
Designer
Marc Newson
Marc Newson is an Australian industrial designer whose work spans Qantas cabins, Apple hardware and Jaeger-LeCoultre's Atmos clocks; his watch design reduces the object to pure geometry and legibility.
Historical significance
Corum Coin Watch 44 mm Blue Carbon sits within Corum's Coin Watch line, introduced in 1970. It carries the house codes established since 1955 — carbon tpt case, blue "grande tapisserie" dial and automatic chronograph — 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 House
Corum
Brand facts
- Founding year
- 1955
- Founder
- René Bannwart
- Headquarters
- Switzerland
- Tier
- Premium
- Major collections
- Admiral, Bubble, Golden Bridge, Coin Watch
- Signature technologies
- In-house hairspring production · Anti-magnetic silicon escapement
- Famous movements
- Spring Drive · Automatic, Swiss lever escapement · Automatic chronograph · High-beat automatic
- Notable watches
- Corum Admiral 39 mm Salmon Carbon (1959) · Corum Admiral 42 mm Green Platinum (2000) · Corum Admiral 36 mm Blue Sapphire (1989) · Corum Admiral 37 mm Blue 18k (1957)
Brand history
Corum has spent more than 71 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Admiral, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
René Bannwart established Corum in 1955, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Corum calibre produced today.
Historical milestones
1955
René Bannwart founds Corum in Switzerland.
1969
The quartz era forces Corum to redefine mechanical watchmaking.
1990
Corum enters the modern collector market with its signature lines.
2024
Corum continues to produce Admiral, Bubble, Golden Bridge and other icons in limited numbers.