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.
Blancpain · Bathyscaphe
Blancpain Bathyscaphe 40 mm Mother-of-pearl Stainless
Reference 82329ST.75
Reference at a glance
- Brand
- Blancpain
- Collection
- Bathyscaphe
- Model
- Blancpain Bathyscaphe 40 mm Mother-of-pearl Stainless
- Reference number
- 82329ST.75
- Year / era
- 2005 · 2000s — modern production
- Complication
- Perpetual calendar
- Movement
- In-house automatic, chronometer certified
- Case material
- Stainless steel
- Dial type
- Mother-of-pearl
- Strap / bracelet
- NATO textile strap
- Water resistance
- 100 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 40 mm
- Case thickness
- 9.4 mm
- Case material
- Stainless steel
- Bezel
- Baguette diamond rainbow
- Crystal
- Sapphire with internal AR treatment
- Dial
- Mother-of-pearl
- Hands
- Rhodium-plated baton hands with luminous fill
- Indexes
- Applied Roman numerals
- Bracelet / strap
- NATO textile strap
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 100 m
Movement
- Movement / calibre
- Calibre 33F — In-house automatic, chronometer certified
- Movement type
- Manual-winding
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- 5 days
- Number of jewels
- 27 jewels
- Complications
- Perpetual calendar
- Functions
- GMT second time zone, date
- Watchmaker
- The calibre is built in-house and adjusted in five positions before delivery.
Production & market
- Production period
- 2005 – 2017
- Limited-edition quantity
- Not applicable
- Current market information
- Consistently trades above retail; waiting lists at authorised dealers remain long.
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
Blancpain Bathyscaphe 40 mm Mother-of-pearl Stainless sits within Blancpain's Bathyscaphe line, introduced in 2005. It carries the house codes established since 1735 — stainless steel 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 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.
- The bracelet tapers across its length, which is why the profile looks thinner on the wrist than the specification suggests.
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
1735
Jehan-Jacques Blancpain founds Blancpain in Switzerland.
1775
Blancpain earns its first international recognition for precision timekeeping.
1969
The quartz era forces Blancpain to redefine mechanical watchmaking.
1990
Blancpain enters the modern collector market with its signature lines.
2024
Blancpain continues to produce Fifty Fathoms, Villeret, Air Command and other icons in limited numbers.