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. · Five Time Zone
Jacob & Co. Five Time Zone 42 mm Blue Carbon
Reference 47396OR.97
Reference at a glance
- Brand
- Jacob & Co.
- Collection
- Five Time Zone
- Model
- Jacob & Co. Five Time Zone 42 mm Blue Carbon
- Reference number
- 47396OR.97
- Year / era
- 1986 · 1980s — mechanical revival
- Complication
- GMT / second time zone
- Movement
- In-house automatic with 22k gold rotor
- Case material
- Carbon TPT
- Dial type
- Blue "Grande Tapisserie"
- Strap / bracelet
- Integrated steel bracelet
- Water resistance
- 500 m
- Limited-edition status
- Regular production, not a limited edition
Case, dial & bracelet
- Case dimensions
- 42 mm
- Case thickness
- 8.1 mm
- Case material
- Carbon TPT
- Bezel
- Baguette diamond rainbow
- Crystal
- Flat sapphire with Cyclops lens
- Dial
- Blue "Grande Tapisserie"
- Hands
- Rhodium-plated baton hands with luminous fill
- Indexes
- Applied Roman numerals
- Bracelet / strap
- Integrated steel bracelet
- Clasp / buckle
- Triple-folding clasp with safety catch
- Water resistance
- 500 m
Movement
- Movement / calibre
- Calibre 8B — In-house automatic with 22k gold rotor
- Movement type
- High-frequency automatic
- Frequency
- 28,800 vph (4 Hz)
- Power reserve
- 72 hours
- Number of jewels
- 27 jewels
- Complications
- GMT / second time zone
- Functions
- Annual calendar, moon phase
- Watchmaker
- The calibre is built in-house and adjusted in five positions before delivery.
Production & market
- Production period
- 1986 – 1990
- Limited-edition quantity
- Not applicable
- Current market information
- Consistently trades above retail; waiting lists at authorised dealers remain long.
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
Jacob & Co. Five Time Zone 42 mm Blue Carbon sits within Jacob & Co.'s Five Time Zone line, introduced in 1986. It carries the house codes established since 1986 — carbon tpt case, blue "grande tapisserie" dial and in-house automatic with 22k gold rotor — 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.
- Early production dials show a slightly different minute track, and collectors pay a premium for them.
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.
More Five Time Zone
Jacob & Co. Five Time Zone 40 mm Ice Ceramic
Ref. 40583OR.76
Jacob & Co. Five Time Zone 43 mm Black Stainless
Ref. 67777ST.21
Jacob & Co. Five Time Zone 43 mm Green Stainless
Ref. 68974ST.50
Jacob & Co. Five Time Zone 42 mm Skeletonised Platinum
Ref. 62370OR.88
Jacob & Co. Five Time Zone 39 mm Silvered Stainless
Ref. 73779ST.81