All Blancpain
Blancpain Fifty Fathoms 41 mm Mother-of-pearl 18k
Front view

Front view

Dial, hands and bezel as delivered.

Case-back view

Case-back view

Case-back engraving and, where fitted, the sapphire display.

Movement

Movement

Calibre with its finishing and decoration.

On the wrist

On the wrist

Worn shot for proportion and strap drape.

Blancpain · Fifty Fathoms

Blancpain Fifty Fathoms 41 mm Mother-of-pearl 18k

Reference 74677OR.47

Reference at a glance

Brand
Blancpain
Collection
Fifty Fathoms
Model
Blancpain Fifty Fathoms 41 mm Mother-of-pearl 18k
Reference number
74677OR.47
Year / era
1981 · 1980s — quartz-crisis era
Complication
Chronograph
Movement
In-house automatic, Superlative Chronometer
Case material
18k yellow gold
Dial type
Mother-of-pearl
Strap / bracelet
NATO textile strap
Water resistance
50 m
Limited-edition status
Regular production, not a limited edition
Compare this reference

Case, dial & bracelet

Case dimensions
41 mm
Case thickness
8.8 mm
Case material
18k yellow gold
Bezel
Baguette diamond rainbow
Crystal
Anti-reflective sapphire, double-domed
Dial
Mother-of-pearl
Hands
Blued steel Breguet-style hands
Indexes
Diamond-set hour markers
Bracelet / strap
NATO textile strap
Clasp / buckle
Pin buckle in matching case metal
Water resistance
50 m

Movement

Movement / calibre
Calibre 4F — In-house automatic, Superlative Chronometer
Movement type
Automatic with micro-rotor
Frequency
25,200 vph (3.5 Hz)
Power reserve
72 hours
Number of jewels
45 jewels
Complications
Chronograph
Functions
Hours, minutes, seconds, date
Watchmaker
Assembled and regulated by a single watchmaker, who signs off the piece before casing.

Production & market

Production period
1981 – 1993
Limited-edition quantity
Not applicable
Current market information
Thin secondary-market supply — pricing is set piece by piece at auction.

Designer

Jean-Jacques Fiechter

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

Blancpain Fifty Fathoms 41 mm Mother-of-pearl 18k sits within Blancpain's Fifty Fathoms line, introduced in 1981. It carries the house codes established since 1735 — 18k yellow gold case, mother-of-pearl dial and in-house automatic, superlative chronometer — 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.
  • 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.
BL

The House

Blancpain

Brand facts

Founding year
1735
Founder
Jehan-Jacques Blancpain
Headquarters
Switzerland
Tier
Luxury
Major collections
Fifty Fathoms, Villeret, Air Command, Bathyscaphe, Le Brassus, Ladybird
Signature technologies
Proprietary case-hardening and polishing · Certified chronometer regulation · Shock-absorbing movement mounting
Famous movements
In-house automatic, Superlative Chronometer · In-house manual-winding · In-house automatic, chronometer certified · In-house automatic chronograph
Notable watches
Blancpain Fifty Fathoms 36 mm Slate Sapphire (1978) · Blancpain Fifty Fathoms 44 mm Mother-of-pearl 18k (1954) · Blancpain Fifty Fathoms 41 mm Skeletonised Quartz (2001) · Blancpain Fifty Fathoms 41 mm Black Stainless (1959)

Brand history

Blancpain has spent more than 291 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Fifty Fathoms, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.

Jehan-Jacques Blancpain established Blancpain in 1735, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Blancpain calibre produced today.

Historical milestones

  1. 1735

    Jehan-Jacques Blancpain founds Blancpain in Switzerland.

  2. 1775

    Blancpain earns its first international recognition for precision timekeeping.

  3. 1969

    The quartz era forces Blancpain to redefine mechanical watchmaking.

  4. 1990

    Blancpain enters the modern collector market with its signature lines.

  5. 2024

    Blancpain continues to produce Fifty Fathoms, Villeret, Air Command and other icons in limited numbers.

More Fifty Fathoms