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.
Oris · Big Crown
Oris Big Crown 44 mm Black Platinum
Reference 25551OR.36
Reference at a glance
- Brand
- Oris
- Collection
- Big Crown
- Model
- Oris Big Crown 44 mm Black Platinum
- Reference number
- 25551OR.36
- Year / era
- 2018 · 2010s — modern production
- Complication
- Perpetual calendar
- Movement
- Automatic, Swiss lever escapement
- Case material
- Platinum 950
- Dial type
- Black lacquer
- Strap / bracelet
- Integrated steel bracelet
- Water resistance
- 100 m
- Limited-edition status
- Limited edition of 100 pieces
Case, dial & bracelet
- Case dimensions
- 44 mm
- Case thickness
- 11.3 mm
- Case material
- Platinum 950
- Bezel
- Bidirectional 24-hour Cerachrom
- Crystal
- Anti-reflective sapphire, double-domed
- Dial
- Black lacquer
- Hands
- Skeletonised sword hands, white luminescent
- Indexes
- Applied Roman numerals
- Bracelet / strap
- Integrated steel bracelet
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 100 m
Movement
- Movement / calibre
- Calibre 24C — Automatic, Swiss lever escapement
- Movement type
- Manual-winding
- Frequency
- 21,600 vph (3 Hz)
- Power reserve
- 65 hours
- Number of jewels
- 21 jewels
- Complications
- Perpetual calendar
- Functions
- Hours, minutes, small seconds
- Watchmaker
- Assembled and regulated by a single watchmaker, who signs off the piece before casing.
Production & market
- Production period
- 2018 – 2033
- Limited-edition quantity
- 100 pieces
- Current market information
- Trades close to retail on the secondary market, with steady demand for full-set examples.
Designer
In-house design 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
Oris Big Crown 44 mm Black Platinum sits within Oris's Big Crown line, introduced in 2018. It carries the house codes established since 1904 — platinum 950 case, black lacquer dial and automatic, swiss lever escapement — 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 House
Oris
Brand facts
- Founding year
- 1904
- Founder
- Paul Cattin & Georges Christian
- Headquarters
- Switzerland
- Tier
- Premium
- Major collections
- Aquis, Big Crown, Divers Sixty-Five, ProPilot, Artelier
- Signature technologies
- Anti-magnetic silicon escapement · Composite and ceramic case materials · Hand-applied guilloché dials
- Famous movements
- Automatic, Swiss lever escapement · High-beat automatic · Automatic chronograph · Spring Drive
- Notable watches
- Oris Aquis 40 mm Mother-of-pearl Ceramic (1986) · Oris Aquis 38 mm Skeletonised Ceramic (1956) · Oris Aquis 39 mm Blue 18k (1951) · Oris Aquis 43 mm Skeletonised 18k (1985)
Brand history
Oris has spent more than 122 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Aquis, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Paul Cattin & Georges Christian established Oris in 1904, working from Switzerland at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Oris calibre produced today.
Historical milestones
1904
Paul Cattin & Georges Christian founds Oris in Switzerland.
1969
The quartz era forces Oris to redefine mechanical watchmaking.
1990
Oris enters the modern collector market with its signature lines.
2024
Oris continues to produce Aquis, Big Crown, Divers Sixty-Five and other icons in limited numbers.