- Movement
- Hand-wound
- Size
- 50 mm
Overview
A solar system on the wrist
The Jacob & Co. Astronomia Tourbillon Baguette, reference AT800.40.HD.UA.B, in an 18-carat rose gold case, 50 mm across and 25 mm high. Its titanium dial has an 18-carat rose gold base dial invisibly set with 133 triangular-cut white diamonds (≈6.52 ct), on a blue alligator strap with an 18-carat rose gold deployant buckle. This version is a pièce unique.
Jacob Arabo turned his interest in space into the Astronomia concept in 2014, modelling a planetary system at wristwatch scale. A vertical platform with four arms rises from the base dial and turns on its own axis, and that motion drives the movement’s functions and indications. The platform completes a revolution in 10 minutes.
Hand-wound calibre JCAM18 has 365 components, 42 jewels and a 60-hour power reserve. A triple-axis flying tourbillon hangs from one arm: its first axis turns in 60 seconds, its second in 2.5 minutes, and the platform adds the third. On another arm, a differential gear system turns the hour and minute dial against the platform at the same speed, so the time stays upright.
Key details
Design and engineering
- Moon and globeThe Jacob cut moon has 288 facets. It and the magnesium globe, lacquered blue, each turn on their own axis in 30 seconds.
- Case band124 triangular-cut white diamonds (≈6.39 ct).
- Lugs100 triangular-cut white diamonds (≈2.32 ct).
- Base dial18-carat rose gold, invisibly set with 133 triangular-cut white diamonds (≈6.52 ct).
- Clasp18-carat rose gold deployant buckle, set with 26 triangular-cut white diamonds (≈1.33 ct).
- Case18-carat rose gold with a domed sapphire crystal and an 18-carat rose gold caseback. Water resistant to 30 m.
Calibre JCAM18
- Hand-wound
- 365 components
- 42 jewels
- 60-hour power reserve
- 21,600 vph (3 Hz)
- Triple-axis flying tourbillon
The reference
Technical specifications
| Reference | AT800.40.HD.UA.B |
|---|---|
| Collection | Astronomia |
| Calibre | JCAM18 |
| Movement | Hand-wound |
| Functions | Hours and Minutes; System: Vertical movement with 4 arms. Full revolution in 10 Minutes around the central axis; Gravitational Triple Axis Tourbillon, 1st axis rotating in 60 seconds, 2nd axis in 2.5 Minutes and 3rd Central Axis in 10 Minutes; Dial rotating with a Patented Differential Gears System℗; Exclusive Jacob cut® Stone (288 Facets), rotating on itself in 30 Seconds; Magnesium Blue Lacquered Globe, rotating on itself in 30 Seconds |
| Power reserve | 60 hours |
| Frequency | 21,600 vib/h (3 Hz) |
| Components | 365 |
| Jewels | 42 |
| Finishing | High Grade Hand Finishing |
| Case dimensions | 50 mm |
| Case height | 25 mm |
| Case material | 18-carat rose gold |
| Crystal | Unique Domed Sapphire Crystal with Multiple Anti-reflective Treatment |
| Case back | 18-carat Rose Gold |
| Water resistance | 30 m (3 atm) |
| Case band | 124 Triangular-Cut White Diamonds (~6.39ct) |
| Lugs | 100 Triangular-Cut White Diamonds (~2.32ct) |
| Bows | Winding and Time-Setting via Lift-out Rotating Bows on the Caseback |
| Dial | Titanium |
| Base dial | 18-carat Rose Gold, invisibly set with 133 Triangular-Cut White Diamonds (≈6.52ct) |
| Hands | Blued, Exclusive Jacob & Co. Shape |
| Strap | Blue alligator |
| Clasp | 18-carat Rose Gold Deployant Buckle Set with 26 Triangular-Cut White Diamonds (≈1.33ct) |
| Limited edition | Pièce unique |
Buying with HYPA
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- Registered Australian dealerHYPA International Pty Ltd · Registered Victorian second-hand dealer, Registration No. SHD-0018017.
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