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.
Mido · Ocean Star
Mido Ocean Star 40 mm Blue Sapphire
Reference 41813OR.18
Reference at a glance
- Brand
- Mido
- Collection
- Ocean Star
- Model
- Mido Ocean Star 40 mm Blue Sapphire
- Reference number
- 41813OR.18
- Year / era
- 1979 · 1970s — quartz-crisis era
- Complication
- Chronograph
- Movement
- Automatic Powermatic 80
- Case material
- Sapphire crystal case
- Dial type
- Blue "Grande Tapisserie"
- Strap / bracelet
- Milanese mesh
- Water resistance
- 200 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 40 mm
- Case thickness
- 14.1 mm
- Case material
- Sapphire crystal case
- Bezel
- Unidirectional ceramic 60-minute
- Crystal
- Anti-reflective sapphire, double-domed
- Dial
- Blue "Grande Tapisserie"
- Hands
- Blued steel Breguet-style hands
- Indexes
- Diamond-set hour markers
- Bracelet / strap
- Milanese mesh
- Clasp / buckle
- Folding clasp in matching case metal
- Water resistance
- 200 m
Movement
- Movement / calibre
- Calibre 7D — Automatic Powermatic 80
- Movement type
- Automatic, self-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 45 hours
- Number of jewels
- 45 jewels
- Complications
- Chronograph
- Functions
- Annual calendar, moon phase
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 1979 – 1995
- Limited-edition quantity
- Not applicable
- Current market information
- Thin secondary-market supply — pricing is set piece by piece at auction.
Designer
Jörg Hysek
Jörg Hysek left Rolex and Seiko's European studios to build a design practice in Geneva, giving houses such as Vacheron Constantin, Breguet, Seiko and TAG Heuer their sculptural, architecture-led cases before founding his own brand, HD3.
Historical significance
Mido Ocean Star 40 mm Blue Sapphire sits within Mido's Ocean Star line, introduced in 1979. It carries the house codes established since 1918 — sapphire crystal case case, blue "grande tapisserie" dial and automatic powermatic 80 — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- The bracelet tapers across its length, which is why the profile looks thinner on the wrist than the specification suggests.
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
- The movement's bridges are decorated even where they will never be seen once the watch is cased.
The House
Mido
Brand facts
- Founding year
- 1918
- Founder
- Georges Schaeren
- Headquarters
- Switzerland
- Tier
- Affordable & Tool Watches
- Major collections
- Ocean Star, Multifort, Baroncelli, Commander
- Signature technologies
- Proprietary case-hardening and polishing · Hand-applied guilloché dials · Composite and ceramic case materials
- Famous movements
- Automatic, 38-hour reserve · Quartz · Automatic Powermatic 80 · Automatic COSC chronometer
- Notable watches
- Mido Ocean Star 39 mm Green Platinum (1988) · Mido Ocean Star 40 mm Blue Sapphire (1979) · Mido Ocean Star 36 mm Salmon 18k (1959) · Mido Multifort 37 mm Green Carbon (1979)
Brand history
Mido has spent more than 108 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Ocean Star, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Georges Schaeren established Mido in 1918, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Mido calibre produced today.
Historical milestones
1918
Georges Schaeren founds Mido in Switzerland.
1969
The quartz era forces Mido to redefine mechanical watchmaking.
1990
Mido enters the modern collector market with its signature lines.
2024
Mido continues to produce Ocean Star, Multifort, Baroncelli and other icons in limited numbers.