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.
Patek Philippe · Nautilus
Patek Philippe Nautilus 38 mm Slate Sapphire
Reference 95664OR.54
Reference at a glance
- Brand
- Patek Philippe
- Collection
- Nautilus
- Model
- Patek Philippe Nautilus 38 mm Slate Sapphire
- Reference number
- 95664OR.54
- Year / era
- 1964 · 1960s — pre-quartz mechanical era
- Complication
- Tourbillon
- Movement
- In-house automatic micro-rotor
- Case material
- Sapphire crystal case
- Dial type
- Slate grey
- Strap / bracelet
- Integrated steel bracelet
- Water resistance
- 100 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 38 mm
- Case thickness
- 8.1 mm
- Case material
- Sapphire crystal case
- Bezel
- Octagonal with 8 hexagonal screws
- Crystal
- Sapphire with internal AR treatment
- Dial
- Slate grey
- Hands
- Rhodium-plated baton hands with luminous fill
- Indexes
- Applied Roman numerals
- Bracelet / strap
- Integrated steel bracelet
- Clasp / buckle
- Folding clasp in matching case metal
- Water resistance
- 100 m
Movement
- Movement / calibre
- Calibre 43D — In-house automatic micro-rotor
- Movement type
- Automatic with micro-rotor
- Frequency
- 25,200 vph (3.5 Hz)
- Power reserve
- 38 hours
- Number of jewels
- 45 jewels
- Complications
- Tourbillon
- Functions
- Dive time, running seconds
- Watchmaker
- Finishing, assembly and timing are carried out in the manufacture's own atelier.
Production & market
- Production period
- 1964 – 1968
- Limited-edition quantity
- Not applicable
- Current market information
- Thin secondary-market supply — pricing is set piece by piece at auction.
Designer
Gérald Genta
Gérald Genta (1931–2011) trained as a goldsmith in Geneva and became the most influential watch designer of the 20th century. Working freelance, he sketched the Audemars Piguet Royal Oak overnight in 1970, followed by the Patek Philippe Nautilus, the IWC Ingenieur SL and the Bulgari Bulgari — defining the integrated-bracelet luxury sports watch as a category.
Historical significance
Patek Philippe Nautilus 38 mm Slate Sapphire sits within Patek Philippe's Nautilus line, introduced in 1964. It carries the house codes established since 1839 — sapphire crystal case case, slate grey dial and in-house automatic micro-rotor — 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 House
Patek Philippe
Brand facts
- Founding year
- 1839
- Founder
- Antoine Norbert de Patek & Adrien Philippe
- Headquarters
- Switzerland
- Tier
- Ultra-Luxury & Haute Horlogerie
- Major collections
- Nautilus, Aquanaut, Calatrava, Complications, Grand Complications, Golden Ellipse, Gondolo, Twenty~4, Cubitus
- Signature technologies
- Composite and ceramic case materials · Hand-applied guilloché dials
- Famous movements
- In-house tourbillon, manual-winding · In-house automatic with 22k gold rotor · In-house manual-winding, hand-finished · In-house automatic micro-rotor
- Notable watches
- Patek Philippe Nautilus 38 mm Slate Quartz (1999) · Patek Philippe Nautilus 41 mm Blue Carbon (1995) · Patek Philippe Nautilus 38 mm Slate Sapphire (1964) · Patek Philippe Nautilus 36 mm Meteorite Grade (1986)
Brand history
Patek Philippe has spent more than 187 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Nautilus, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Antoine Norbert de Patek & Adrien Philippe established Patek Philippe in 1839, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Patek Philippe calibre produced today.
Historical milestones
1839
Antoine Norbert de Patek & Adrien Philippe founds Patek Philippe in Switzerland.
1879
Patek Philippe earns its first international recognition for precision timekeeping.
1969
The quartz era forces Patek Philippe to redefine mechanical watchmaking.
1990
Patek Philippe enters the modern collector market with its signature lines.
2024
Patek Philippe continues to produce Nautilus, Aquanaut, Calatrava and other icons in limited numbers.