Yema
Yema Navygraf 41 mm Green Sapphire
Photography on request
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.
Yema · Navygraf
Yema Navygraf 41 mm Green Sapphire
Reference 47011OR.73
Reference at a glance
- Brand
- Yema
- Collection
- Navygraf
- Model
- Yema Navygraf 41 mm Green Sapphire
- Reference number
- 47011OR.73
- Year / era
- 1976 · 1970s — quartz-crisis era
- Complication
- Flyback chronograph
- Movement
- Automatic COSC chronometer
- Case material
- Sapphire crystal case
- Dial type
- Green sunburst
- Strap / bracelet
- Oyster bracelet
- Water resistance
- 100 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 41 mm
- Case thickness
- 12.6 mm
- Case material
- Sapphire crystal case
- Bezel
- Baguette diamond rainbow
- Crystal
- Sapphire with internal AR treatment
- Dial
- Green sunburst
- Hands
- Skeletonised sword hands, white luminescent
- Indexes
- Applied Roman numerals
- Bracelet / strap
- Oyster bracelet
- Clasp / buckle
- Folding clasp in matching case metal
- Water resistance
- 100 m
Movement
- Movement / calibre
- Calibre 86E — Automatic COSC chronometer
- Movement type
- Automatic, self-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 70 hours
- Number of jewels
- 25 jewels
- Complications
- Flyback chronograph
- Functions
- Hours, minutes, seconds, date
- Watchmaker
- Finishing, assembly and timing are carried out in the manufacture's own atelier.
Production & market
- Production period
- 1976 – 1985
- Limited-edition quantity
- Not applicable
- Current market information
- Trades close to retail on the secondary market, with steady demand for full-set examples.
Designer
In-house design studio
The reference was drawn by the manufacture's internal design office, where case, dial and movement architects work alongside the watchmakers rather than as an outside commission.
Historical significance
Yema Navygraf 41 mm Green Sapphire sits within Yema's Navygraf line, introduced in 1976. It carries the house codes established since 1948 — sapphire crystal case case, green sunburst dial and automatic cosc chronometer — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
The House
Yema
Brand facts
- Founding year
- 1948
- Founder
- Henry Louis Belmont
- Headquarters
- France
- Tier
- Affordable & Tool Watches
- Major collections
- Superman, Navygraf, Wristmaster, Rallygraf
- Signature technologies
- Shock-absorbing movement mounting · In-house hairspring production · Certified chronometer regulation
- Famous movements
- Automatic, 38-hour reserve · Automatic Powermatic 80 · Quartz · Automatic COSC chronometer
- Notable watches
- Yema Superman 41 mm Ice 18k (1952) · Yema Superman 40 mm Ice Sapphire (1976) · Yema Superman 39 mm Green Stainless (1983) · Yema Superman 37 mm Meteorite Stainless (1961)
Brand history
Yema has spent more than 78 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Superman, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Henry Louis Belmont established Yema in 1948, working from France at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Yema calibre produced today.
Historical milestones
1948
Henry Louis Belmont founds Yema in France.
1969
The quartz era forces Yema to redefine mechanical watchmaking.
1990
Yema enters the modern collector market with its signature lines.
2024
Yema continues to produce Superman, Navygraf, Wristmaster and other icons in limited numbers.