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 · Memoris
Louis Moinet Memoris 43 mm Skeletonised Stainless
Reference 45025ST.39
Reference at a glance
- Brand
- Louis Moinet
- Collection
- Memoris
- Model
- Louis Moinet Memoris 43 mm Skeletonised Stainless
- Reference number
- 45025ST.39
- Year / era
- 1957 · 1950s — pre-quartz mechanical era
- Complication
- Perpetual calendar
- Movement
- Manual-winding, hand-finished
- Case material
- Stainless steel
- Dial type
- Skeletonised
- Strap / bracelet
- NATO textile strap
- Water resistance
- 100 m
- Limited-edition status
- Limited edition of 50 pieces
Case, dial & bracelet
- Case dimensions
- 43 mm
- Case thickness
- 12.6 mm
- Case material
- Stainless steel
- Bezel
- Bidirectional 24-hour Cerachrom
- Crystal
- Box sapphire with AR coating
- Dial
- Skeletonised
- Hands
- Rhodium-plated baton hands with luminous fill
- Indexes
- Applied Roman numerals
- Bracelet / strap
- NATO textile strap
- Clasp / buckle
- Pin buckle in matching case metal
- Water resistance
- 100 m
Movement
- Movement / calibre
- Calibre 55E — Manual-winding, hand-finished
- Movement type
- Automatic with micro-rotor
- Frequency
- 25,200 vph (3.5 Hz)
- Power reserve
- 70 hours
- Number of jewels
- 25 jewels
- Complications
- Perpetual calendar
- Functions
- Hours, minutes, small seconds
- Watchmaker
- Finishing, assembly and timing are carried out in the manufacture's own atelier.
Production & market
- Production period
- 1957 – 1960
- Limited-edition quantity
- 50 pieces
- Current market information
- Trades close to retail on the secondary market, with steady demand for full-set examples.
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 Memoris 43 mm Skeletonised Stainless sits within Louis Moinet's Memoris line, introduced in 1957. It carries the house codes established since 1806 — stainless steel case, skeletonised dial and manual-winding, hand-finished — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
- The movement's bridges are decorated even where they will never be seen once the watch is cased.
- The reference was originally planned as a one-year run and stayed in the catalogue for well over a decade.
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.