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.
Longines · HydroConquest
Longines HydroConquest 44 mm Mother-of-pearl Ceramic
Reference 12598OR.37
Reference at a glance
- Brand
- Longines
- Collection
- HydroConquest
- Model
- Longines HydroConquest 44 mm Mother-of-pearl Ceramic
- Reference number
- 12598OR.37
- Year / era
- 2005 · 2000s — modern production
- Complication
- Time and date
- Movement
- Automatic, Swiss lever escapement
- Case material
- Ceramic
- Dial type
- Mother-of-pearl
- Strap / bracelet
- Milanese mesh
- Water resistance
- 30 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 44 mm
- Case thickness
- 10.2 mm
- Case material
- Ceramic
- Bezel
- Emerald-set
- Crystal
- Anti-reflective sapphire, double-domed
- Dial
- Mother-of-pearl
- Hands
- Mercedes hour hand with Chromalight display
- Indexes
- Applied Arabic numerals with luminous coating
- Bracelet / strap
- Milanese mesh
- Clasp / buckle
- Pin buckle in matching case metal
- Water resistance
- 30 m
Movement
- Movement / calibre
- Calibre 3A — Automatic, Swiss lever escapement
- Movement type
- Automatic, self-winding
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- 72 hours
- Number of jewels
- 40 jewels
- Complications
- Time and date
- Functions
- Perpetual calendar, leap year
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 2005 – 2016
- 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
Longines HydroConquest 44 mm Mother-of-pearl Ceramic sits within Longines's HydroConquest line, introduced in 2005. It carries the house codes established since 1832 — ceramic case, mother-of-pearl dial and automatic, swiss lever escapement — and is one of the references collectors use to date the evolution of the collection.
Interesting facts
- 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.
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
The House
Longines
Brand facts
- Founding year
- 1832
- Founder
- Auguste Agassiz
- Headquarters
- Switzerland
- Tier
- Premium
- Major collections
- Master Collection, HydroConquest, Spirit, Legend Diver, DolceVita, Conquest
- Signature technologies
- Proprietary case-hardening and polishing · Shock-absorbing movement mounting · In-house hairspring production
- Famous movements
- High-beat automatic · Automatic chronograph · Automatic, Swiss lever escapement · Spring Drive
- Notable watches
- Longines Master Collection 44 mm Green Ceramic (1974) · Longines Master Collection 40 mm Meteorite 18k (1964) · Longines Master Collection 41 mm Black 18k (1998) · Longines Master Collection 44 mm Skeletonised Sapphire (1969)
Brand history
Longines has spent more than 194 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Master Collection, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Auguste Agassiz established Longines in 1832, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Longines calibre produced today.
Historical milestones
1832
Auguste Agassiz founds Longines in Switzerland.
1872
Longines earns its first international recognition for precision timekeeping.
1969
The quartz era forces Longines to redefine mechanical watchmaking.
1990
Longines enters the modern collector market with its signature lines.
2024
Longines continues to produce Master Collection, HydroConquest, Spirit and other icons in limited numbers.