- Movement
- Hand-wound
- Size
- 45.5 mm
Overview
A vertical platform that turns in 10 minutes
The Jacob & Co. Astronomia Solar Constellations, reference AS900.64.AA.UB.A, in a palladium case with sapphire side panes, 45.5 mm across and 21 mm high. It has an openworked palladium hour and minute dial and a platform set with 120 white diamonds (≈2.52 ct) and 80 rubies (≈3.94 ct), on a blue alligator leather strap with a tang buckle.
A vertical platform rises from the dial and makes a full turn every 10 minutes. Jacob & Co. says this constant motion drives every function and indication of the movement. The base beneath the platform turns counterclockwise, also in 10 minutes.
Hand-wound calibre JCAM28 has 447 components and a 48-hour power reserve. A flying tourbillon hangs at the end of one satellite arm and turns in one minute. Carried by the platform, it gains a second axis with a 10-minute period. The hour and minute dial sits on another arm. Jacob & Co. describes a patented differential that turns the dial against the platform at the same speed, so it stays upright and readable. A magnesium Earth globe turns in 60 seconds.
Key details
Design and engineering
- Platform and tourbillonThe platform turns once in 10 minutes and carries a flying tourbillon that turns in one minute.
- Gem-setting: Case184 baguette-cut white diamonds (≈9.97 ct).
- Gem-setting: Platform120 white diamonds (≈2.52 ct) and 80 rubies (≈3.94 ct).
- Gem-setting: Clasp21 baguette-cut diamonds (≈1.07 ct).
- DialAn off-centred, openworked hour and minute dial in palladium, with blued hands.
- CasePalladium with sapphire side panes, a curved anti-reflective sapphire crystal and an 18-carat white gold caseback. Water resistant to 30 m.
Calibre JCAM28
- Hand-wound
- 447 components
- 48-hour power reserve
- 28,800 vph (4 Hz)
- Flying tourbillon, one rotation in 1 minute
- Differential hour and minute dial
The reference
Technical specifications
| Reference | AS900.64.AA.UB.A |
|---|---|
| Collection | Astronomia |
| Calibre | JCAM28 |
| Movement | Hand-wound |
| Functions | Vertical Rotating Central Platform: Rotation in 10 minutes; Flying Tourbillon: Rotation in 1 Minute; Off-centered Hour and Minute Dial with Differential; Rotating Base: Counterclockwise Rotation in 10 minutes; Rotating Magnesium Earth Globe: Rotation in 60 Seconds |
| Power reserve | 48 hours |
| Frequency | 28,800 vph (4 Hz) |
| Components | 447 |
| Case dimensions | 45.5 mm |
| Case height | 21 mm |
| Case material | Palladium and sapphire side panes |
| Crystal | Curved Anti-Reflective Sapphire Crystal |
| Case back | 18-carat White Gold |
| Water resistance | 30 m (3 atm) |
| Gem-setting: Case | Set with 184 Baguette White Diamonds (≈9.97 ct.) |
| Gem-setting: Dial | Set with 120 White Diamonds (≈2.52 ct.) and 80 Rubies (≈3.94 ct.) |
| Gem-setting: Clasp | Set with 21 Baguette Diamonds (≈1.07 ct.) |
| Dial | Palladium, Openworked Hour and Minute Dial |
| Hands | Blued, Exclusive Jacob & Co. Shape |
| Strap | Blue alligator leather |
| Clasp | Tang Buckle |
Buying with HYPA
Purchase with confidence
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- Payment by bank transfer
- Registered Australian dealerHYPA International Pty Ltd · Registered Victorian second-hand dealer, Registration No. SHD-0018017.
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