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 · Le Brassus
Blancpain Le Brassus 37 mm Skeletonised Grade
Reference 79907OR.59
Reference at a glance
- Brand
- Blancpain
- Collection
- Le Brassus
- Model
- Blancpain Le Brassus 37 mm Skeletonised Grade
- Reference number
- 79907OR.59
- Year / era
- 1951 · 1950s — pre-quartz mechanical era
- Complication
- Moon phase
- Movement
- In-house automatic chronograph
- Case material
- Grade 5 titanium
- Dial type
- Skeletonised
- Strap / bracelet
- Milanese mesh
- Water resistance
- 50 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 37 mm
- Case thickness
- 8.8 mm
- Case material
- Grade 5 titanium
- Bezel
- Fluted 18k gold
- Crystal
- Box sapphire with AR coating
- Dial
- Skeletonised
- Hands
- Skeletonised sword hands, white luminescent
- Indexes
- Applied Roman numerals
- Bracelet / strap
- Milanese mesh
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 50 m
Movement
- Movement / calibre
- Calibre 83F — In-house automatic chronograph
- Movement type
- Manual-winding
- Frequency
- 36,000 vph (5 Hz)
- Power reserve
- 70 hours
- Number of jewels
- 25 jewels
- Complications
- Moon phase
- Functions
- Flying tourbillon, power reserve
- Watchmaker
- The calibre is built in-house and adjusted in five positions before delivery.
Production & market
- Production period
- 1951 – 1959
- Limited-edition quantity
- Not applicable
- Current market information
- Trades close to retail on the secondary market, with steady demand for full-set examples.
Designer
In-house design studio
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 Le Brassus 37 mm Skeletonised Grade sits within Blancpain's Le Brassus line, introduced in 1951. It carries the house codes established since 1735 — grade 5 titanium case, skeletonised 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 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 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.