The Astronomia is the embodiment of 21st century ultra-high-end watchmaking and a globally recognized symbol of Jacob & Co watchmaking expertise. A world-first both in the boldness of its unprecedented concept and its entirely mechanical construction, the Astronomia has gone beyond impressive horological achievements to becoming an outstanding multidisciplinary engineering accomplishment.

At the center of the Astronomia is an unprecedented four-arm movement. Attached to each arm is a novel complication. Two of the complications have earned patents because of their design and engineering. The other two are original works of art that highlight Jacob & Co.’s skilled craftsmanship. When combined, they contribute to a spectacle of moving objects that rotates and floats inside a spectacular sapphire crystal case.

The Astronomia Sky introduces new complications of celestial inspiration to Astronomia: a sidereal display, vertical month display, zodiac signs, day and night indication, as well as a celestial panorama, orbital second indication and a Jacob-Cut® diamond Moon have all been added to fully transform the iconic Astronomia. Full of unparalleled watchmaking solutions and adorned with exceptional finishing techniques, the Astronomia Sky is a poetic and singular entity in ultra-high-end watchmaking.

Movement:
Caliber: Manufacture Jacob&Co. Manual Winding JCAM11;
Diameter: 40mm;
Height: 17.15mm;
Components: 395;
Material: Titanium;
Jewels: 42;
System: Triple Axis Gravitational Tourbillon;
Finishing: Plate and Bridges: Hand Angled and Polished, Flank Draw, Circular Graining, Polished Sink; Polished Screws;
Power Reserve: 60-Hours;
Frequency: 21’600 vib/h (3 Hz);

Functions:
SIDEREAL DISPLAY
Celestial Dial covering the internal surface of the inside case, representing the celestial vault through zodiac signs
A full rotation in 1 sidereal year1.
Oval sky indication: Showing the portion of the stars visible from the northern hemisphere, a full rotation in 1 sidereal day2 above the celestial vault.
Month indication: 12 months on sides of the celestial dial.

Day and Night Indication:
Lacquered hand-engraved titanium globe, rotating on itself in 24 hours, inside a tinted half-domed sapphire, symbolizing night and day.


Gravitational Triple Axis Tourbillon
Rotating on 3 axes:
• 1st Axis: in 60 seconds,
• 2nd Axis: in 5 minutes,
• 3rd Axis: Central Axe, travelling across the celestial vault in 20 minutes;

Orbital Second Indication
Rotating on 2 axes:
• 1st Axis: in 60 seconds,
• 2nd Axis: Central Axe, travelling across the celestial vault in 20 minutes
Open Worked Titanium Wheel and Hand indicating seconds;

Hour and Minute Indication
Patented differential system
Rotating on a Central Axe, travelling across the celestial vault in 20 minutes;

The Jacob Cut Moon
Weight: 1 carat; 288 Facets Diamond Patented Jacob Cut
Rotating on 2 axes:
• 1st Axis in 60 seconds.
• 2nd Axis: Central Axe, travelling across the celestial vault in 20 minutes

Case:
Diameter: 47mm;
Thickness: 25mm;
Material: 18K White Gold; Sapphire Apertures on Sides;
Case Back: 18K White Gold;
Bows: 18K White Gold lift-out Rotating “bows” for Winding, Time-Setting; two Wheel on Caseback Sides for Synchronization of the Sidereal Time: Celestial Dial and Oval Sky Indicator.
Crystal: Unique Domed Sapphire with Anti-Reflective Treatment;
Water resistance: 30m (ISO 2281).

Dial and Hands:
Celestial Dial:
Blue Grade 5 Titanium, 18K Gold hand-engraved and applied stars and zodiacal signs;
Hour and Minute Subdial:
Titanium, Hand Angled and Polished, Lacquered Indexes; Differential Gear System;
Hands: Blued Jacob&Co hands

Strap and Clasp:
Alligator;
18K White Gold Folding Buckle

Limited Edition:
18 pieces