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 · Aquanaut
Patek Philippe Aquanaut 44 mm Slate Platinum
Reference 50630OR.29
Reference at a glance
- Brand
- Patek Philippe
- Collection
- Aquanaut
- Model
- Patek Philippe Aquanaut 44 mm Slate Platinum
- Reference number
- 50630OR.29
- Year / era
- 1950 · 1950s — pre-quartz mechanical era
- Complication
- GMT / second time zone
- Movement
- In-house tourbillon, manual-winding
- Case material
- Platinum 950
- Dial type
- Slate grey
- Strap / bracelet
- Jubilee bracelet
- Water resistance
- 30 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 44 mm
- Case thickness
- 9.4 mm
- Case material
- Platinum 950
- Bezel
- Unidirectional ceramic 60-minute
- Crystal
- Sapphire with internal AR treatment
- Dial
- Slate grey
- Hands
- Mercedes hour hand with Chromalight display
- Indexes
- Printed minute track with applied batons
- Bracelet / strap
- Jubilee bracelet
- Clasp / buckle
- Triple-folding clasp with safety catch
- Water resistance
- 30 m
Movement
- Movement / calibre
- Calibre 79D — In-house tourbillon, manual-winding
- Movement type
- Manual-winding
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- 72 hours
- Number of jewels
- 40 jewels
- Complications
- GMT / second time zone
- Functions
- Hours, minutes, seconds, date
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 1950 – 1966
- Limited-edition quantity
- Not applicable
- Current market information
- Thin secondary-market supply — pricing is set piece by piece at auction.
Designer
Patek Philippe Créations 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
Patek Philippe Aquanaut 44 mm Slate Platinum sits within Patek Philippe's Aquanaut line, introduced in 1950. It carries the house codes established since 1839 — platinum 950 case, slate grey dial and in-house tourbillon, manual-winding — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- 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 movement's bridges are decorated even where they will never be seen once the watch is cased.
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.