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.
Jacob & Co. · Astronomia
Jacob & Co. Astronomia 38 mm Silvered Platinum
Reference 54591OR.51
Reference at a glance
- Brand
- Jacob & Co.
- Collection
- Astronomia
- Model
- Jacob & Co. Astronomia 38 mm Silvered Platinum
- Reference number
- 54591OR.51
- Year / era
- 2008 · 2000s — modern production
- Complication
- Moon phase
- Movement
- In-house tourbillon, manual-winding
- Case material
- Platinum 950
- Dial type
- Silvered opaline
- Strap / bracelet
- Jubilee bracelet
- Water resistance
- 200 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 38 mm
- Case thickness
- 10.2 mm
- Case material
- Platinum 950
- Bezel
- Fixed brushed titanium
- Crystal
- Box sapphire with AR coating
- Dial
- Silvered opaline
- Hands
- Faceted dauphine hands, polished by hand
- Indexes
- Printed minute track with applied batons
- Bracelet / strap
- Jubilee bracelet
- Clasp / buckle
- Titanium deployant clasp
- Water resistance
- 200 m
Movement
- Movement / calibre
- Calibre 74D — In-house tourbillon, manual-winding
- Movement type
- High-frequency automatic
- Frequency
- 28,800 vph (4 Hz)
- Power reserve
- 10 days
- Number of jewels
- 40 jewels
- Complications
- Moon phase
- Functions
- Hours, minutes, small seconds
- Watchmaker
- The calibre is built in-house and adjusted in five positions before delivery.
Production & market
- Production period
- 2008 – 2014
- Limited-edition quantity
- Not applicable
- Current market information
- Thin secondary-market supply — pricing is set piece by piece at auction.
Designer
Marc Newson
Marc Newson is an Australian industrial designer whose work spans Qantas cabins, Apple hardware and Jaeger-LeCoultre's Atmos clocks; his watch design reduces the object to pure geometry and legibility.
Historical significance
Jacob & Co. Astronomia 38 mm Silvered Platinum sits within Jacob & Co.'s Astronomia line, introduced in 2008. It carries the house codes established since 1986 — platinum 950 case, silvered opaline 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 movement's bridges are decorated even where they will never be seen once the watch is cased.
- The case is finished by hand, alternating polished and satin-brushed surfaces in a single pass so the edges stay razor sharp.
The House
Jacob & Co.
Brand facts
- Founding year
- 1986
- Founder
- Jacob Arabo
- Headquarters
- United States
- Tier
- Ultra-Luxury & Haute Horlogerie
- Major collections
- Astronomia, Billionaire, Bugatti Chiron, Casino Tourbillon, Epic X, Twin Turbo Furious, Five Time Zone
- Signature technologies
- Anti-magnetic silicon escapement · Hand-applied guilloché dials · Composite and ceramic case materials
- Famous movements
- In-house automatic with 22k gold rotor · In-house automatic micro-rotor · In-house manual-winding, hand-finished · In-house tourbillon, manual-winding
- Notable watches
- Jacob & Co. Astronomia 40 mm Meteorite 18k (2001) · Jacob & Co. Astronomia 42 mm Blue Sapphire (2002) · Jacob & Co. Astronomia 42 mm Skeletonised Carbon (1986) · Jacob & Co. Astronomia 39 mm Green Platinum (2002)
Brand history
Jacob & Co. has spent more than 40 years refining a single idea: a watch should outlive its owner. From the earliest workshop pieces to today's Astronomia, the house has balanced technical ambition with a recognisable design language, and its collections remain among the most closely followed by collectors worldwide.
Jacob Arabo established Jacob & Co. in 1986, working from United States at a time when precision was measured by hand. The founder's obsession with finishing and accuracy still defines every Jacob & Co. calibre produced today.
Historical milestones
1986
Jacob Arabo founds Jacob & Co. in United States.
1990
Jacob & Co. enters the modern collector market with its signature lines.
2024
Jacob & Co. continues to produce Astronomia, Billionaire, Bugatti Chiron and other icons in limited numbers.