watch-galleries



ASTRONOMIA SKY by Jacob&Co.

Español Pусский
December 2017


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 year (1).

Oval sky indication: Showing the portion of the stars visible from the northern hemisphere, a full rotation in 1 sidereal day (2) 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 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;

(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).