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.
Louis Moinet · Impulsion
Louis Moinet Impulsion 39 mm Mother-of-pearl Stainless
Reference 54334ST.80
Reference at a glance
- Brand
- Louis Moinet
- Collection
- Impulsion
- Model
- Louis Moinet Impulsion 39 mm Mother-of-pearl Stainless
- Reference number
- 54334ST.80
- Year / era
- 2017 · 2010s — modern production
- Complication
- Tourbillon
- Movement
- In-house automatic
- Case material
- Stainless steel
- Dial type
- Mother-of-pearl
- Strap / bracelet
- Milanese mesh
- Water resistance
- 200 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 39 mm
- Case thickness
- 11.3 mm
- Case material
- Stainless steel
- Bezel
- Unidirectional ceramic 60-minute
- Crystal
- Sapphire with internal AR treatment
- Dial
- Mother-of-pearl
- Hands
- Blued steel Breguet-style hands
- Indexes
- Diamond-set hour markers
- Bracelet / strap
- Milanese mesh
- Clasp / buckle
- Pin buckle in matching case metal
- Water resistance
- 200 m
Movement
- Movement / calibre
- Calibre 84B — In-house automatic
- Movement type
- Automatic with micro-rotor
- Frequency
- 28,800 vph (4 Hz)
- Power reserve
- 65 hours
- Number of jewels
- 27 jewels
- Complications
- Tourbillon
- Functions
- Dive time, running seconds
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 2017 – 2027
- 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
Louis Moinet Impulsion 39 mm Mother-of-pearl Stainless sits within Louis Moinet's Impulsion line, introduced in 2017. It carries the house codes established since 1806 — stainless steel case, mother-of-pearl dial and in-house automatic — 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.
- The bracelet tapers across its length, which is why the profile looks thinner on the wrist than the specification suggests.
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
The House
Louis Moinet
Brand facts
- Founding year
- 1806
- Founder
- Louis Moinet
- Headquarters
- Switzerland
- Tier
- Swiss & Independent
- Major collections
- Memoris, Space Revolution, Impulsion, Cosmopolis
- Signature technologies
- Certified chronometer regulation · In-house hairspring production · Proprietary case-hardening and polishing
- Famous movements
- Satellite-hour automatic · Manual-winding, hand-finished · Micro-rotor automatic · In-house automatic
- Notable watches
- Louis Moinet Memoris 38 mm Skeletonised Carbon (1958) · Louis Moinet Memoris 44 mm Mother-of-pearl Quartz (1987) · Louis Moinet Memoris 41 mm Blue Sapphire (1951) · Louis Moinet Memoris 43 mm Slate Sapphire (1978)
Brand history
Louis Moinet has spent more than 220 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Memoris, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Louis Moinet established Louis Moinet in 1806, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Louis Moinet calibre produced today.
Historical milestones
1806
Louis Moinet founds Louis Moinet in Switzerland.
1846
Louis Moinet earns its first international recognition for precision timekeeping.
1969
The quartz era forces Louis Moinet to redefine mechanical watchmaking.
1990
Louis Moinet enters the modern collector market with its signature lines.
2024
Louis Moinet continues to produce Memoris, Space Revolution, Impulsion and other icons in limited numbers.