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.
Omega · Planet Ocean
Omega Planet Ocean 42 mm Ice 18k
Reference 52171OR.35
Reference at a glance
- Brand
- Omega
- Collection
- Planet Ocean
- Model
- Omega Planet Ocean 42 mm Ice 18k
- Reference number
- 52171OR.35
- Year / era
- 1972 · 1970s — quartz-crisis era
- Complication
- Minute repeater
- Movement
- In-house automatic chronograph
- Case material
- 18k white gold
- Dial type
- Ice blue
- Strap / bracelet
- Alligator leather with folding clasp
- Water resistance
- 200 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 42 mm
- Case thickness
- 14.1 mm
- Case material
- 18k white gold
- Bezel
- Bidirectional 24-hour Cerachrom
- Crystal
- Sapphire with internal AR treatment
- Dial
- Ice blue
- Hands
- Faceted dauphine hands, polished by hand
- Indexes
- Printed minute track with applied batons
- Bracelet / strap
- Alligator leather with folding clasp
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 200 m
Movement
- Movement / calibre
- Calibre 11B — In-house automatic chronograph
- Movement type
- Manual-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 5 days
- Number of jewels
- 45 jewels
- Complications
- Minute repeater
- Functions
- Hours, minutes, small seconds
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 1972 – 1978
- Limited-edition quantity
- Not applicable
- Current market information
- Thin secondary-market supply — pricing is set piece by piece at auction.
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
Omega Planet Ocean 42 mm Ice 18k sits within Omega's Planet Ocean line, introduced in 1972. It carries the house codes established since 1848 — 18k white gold case, ice blue dial and in-house automatic chronograph — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- The reference was originally planned as a one-year run and stayed in the catalogue for well over a decade.
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
The House
Omega
Brand facts
- Founding year
- 1848
- Founder
- Louis Brandt
- Headquarters
- Switzerland
- Tier
- Luxury
- Major collections
- Speedmaster, Seamaster, Constellation, De Ville, Aqua Terra, Planet Ocean, Railmaster
- Signature technologies
- Hand-applied guilloché dials · Composite and ceramic case materials · Certified chronometer regulation
- Famous movements
- In-house manual-winding · In-house automatic chronograph · In-house automatic, Superlative Chronometer · In-house automatic, chronometer certified
- Notable watches
- Omega Speedmaster 38 mm Slate Sapphire (1961) · Omega Speedmaster 39 mm Blue Quartz (1952) · Omega Speedmaster 44 mm Meteorite 18k (2001) · Omega Speedmaster 36 mm Slate 18k (1981)
Brand history
Omega has spent more than 178 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Speedmaster, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Louis Brandt established Omega in 1848, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Omega calibre produced today.
Historical milestones
1848
Louis Brandt founds Omega in Switzerland.
1888
Omega earns its first international recognition for precision timekeeping.
1969
The quartz era forces Omega to redefine mechanical watchmaking.
1990
Omega enters the modern collector market with its signature lines.
2024
Omega continues to produce Speedmaster, Seamaster, Constellation and other icons in limited numbers.