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.
Zenith · El Primero
Zenith El Primero 42 mm Mother-of-pearl Ceramic
Reference 12892OR.10
Reference at a glance
- Brand
- Zenith
- Collection
- El Primero
- Model
- Zenith El Primero 42 mm Mother-of-pearl Ceramic
- Reference number
- 12892OR.10
- Year / era
- 1965 · 1960s — pre-quartz mechanical era
- Complication
- Perpetual calendar
- Movement
- In-house automatic, chronometer certified
- Case material
- Ceramic
- Dial type
- Mother-of-pearl
- Strap / bracelet
- Rubber strap with titanium clasp
- Water resistance
- 300 m
- Limited-edition status
- Limited edition of 88 pieces
Case, dial & bracelet
- Case dimensions
- 42 mm
- Case thickness
- 9.4 mm
- Case material
- Ceramic
- Bezel
- Smooth polished
- Crystal
- Anti-reflective sapphire, double-domed
- Dial
- Mother-of-pearl
- Hands
- Blued steel Breguet-style hands
- Indexes
- Applied Arabic numerals with luminous coating
- Bracelet / strap
- Rubber strap with titanium clasp
- Clasp / buckle
- Pin buckle in matching case metal
- Water resistance
- 300 m
Movement
- Movement / calibre
- Calibre 57A — In-house automatic, chronometer certified
- Movement type
- Automatic, self-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 65 hours
- Number of jewels
- 25 jewels
- Complications
- Perpetual calendar
- Functions
- Chronograph, tachymeter, date
- Watchmaker
- Finishing, assembly and timing are carried out in the manufacture's own atelier.
Production & market
- Production period
- 1965 – 1970
- Limited-edition quantity
- 88 pieces
- Current market information
- Trades close to retail on the secondary market, with steady demand for full-set examples.
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
Zenith El Primero 42 mm Mother-of-pearl Ceramic sits within Zenith's El Primero line, introduced in 1965. It carries the house codes established since 1865 — ceramic case, mother-of-pearl dial and in-house automatic, chronometer certified — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
- The reference was originally planned as a one-year run and stayed in the catalogue for well over a decade.
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
The House
Zenith
Brand facts
- Founding year
- 1865
- Founder
- Georges Favre-Jacot
- Headquarters
- Switzerland
- Tier
- Luxury
- Major collections
- El Primero, Chronomaster, Defy, Pilot, Elite
- Signature technologies
- Proprietary case-hardening and polishing · In-house hairspring production · Certified chronometer regulation
- Famous movements
- In-house automatic, Superlative Chronometer · In-house automatic, chronometer certified · In-house manual-winding · In-house automatic chronograph
- Notable watches
- Zenith El Primero 42 mm Slate Platinum (1954) · Zenith El Primero 42 mm Mother-of-pearl Ceramic (1965) · Zenith El Primero 41 mm Skeletonised Sapphire (1975) · Zenith El Primero 40 mm Silvered 18k (1995)
Brand history
Zenith has spent more than 161 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's El Primero, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Georges Favre-Jacot established Zenith in 1865, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Zenith calibre produced today.
Historical milestones
1865
Georges Favre-Jacot founds Zenith in Switzerland.
1899
Zenith earns its first international recognition for precision timekeeping.
1969
The quartz era forces Zenith to redefine mechanical watchmaking.
1990
Zenith enters the modern collector market with its signature lines.
2024
Zenith continues to produce El Primero, Chronomaster, Defy and other icons in limited numbers.