ASTRONOMIA SKY BLACK

Available upon request

47mm
18K Black Gold;
Water resistance: 30m

ASTRONOMIA SKY
AT110.31.AA.WD.A

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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.

TECHNICAL SPECIFICATIONS

MOVEMENT: Manufacture Jacob&Co. Manual Winding JCAM11; Diameter: 40mm; Height: 17.15mm; Components: 395; Material: Titanium with Black Treatment; 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 counter clockwise.
Oval sky indication: Showing the portion of the stars visible from the northern hemisphere, a full rotation clockwise in 1 sidereal day2 above the celestial vault.
Month indication: 12 months on sides of the celestial dial: indication index at 6 o’clock.

DAY AND NIGHT INDICATION

Lacquered hand-engraved titanium globe, rotating on 2 axes:
• 1st Axis: A full rotation on itself in 24 hours;
• 2nd Axis: Central Axe, travelling across the celestial vault in 20 minutes; 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 & 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 White 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: 47mm; Thickness: 25mm; Material: 18K Black Gold; Sapphire Apertures on Sides; Case Back: 18K Black Gold; Bows: 18K Black 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: Celestial Dial: Black 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: Hand Finished Blue.

STRAP & CLASP: Alligator; 18K Black Gold; Folding Buckle. Limited Edition: 18 Pieces; Individually Numbered Pieces.

1 One sidereal year is the time it takes the earth to orbit the sun.

2 Sidereal Day= 23.5640916 hours, it is the time it takes the earth to rotate on its axis (relative to vernal equinox).

LIMITED EDITION: 18 pieces

Story of brand

The driving force for Jacob & Co. is creativity. From his earliest beginnings in jewelry and watches, Jacob Arabo has been designing beautiful and innovative products. The breadth of Jacob & Co.'s offering shows the brand's insatiable need to produce amazing pieces that the world has never seen before.

Read the full story of the brand