Girard-Perregaux COSMOS User manual

USER MANUAL
COSMOS

INSTRUCTION FOR USE
ASTRONOMY AS A TIME MEASUREMENT INSTRUMENT
The measurement of time finds its origins in the observation of astronomical phenomena such as
the motions of celestial bodies in the sky. Most of the calendars have been developed according to
the movements of the Sun as Man observed a regular alternation of diurnal and nocturnal periods
of time. Thus, it is customary to measure a day according to the position of the Sun with respect
to the Earth.
A sidereal day and a solar day must be differentiated in terms of duration. A sidereal day lasts 23
hours, 56 minutes and 4 seconds, which corresponds to a 360 degrees full rotation of the Earth
on itself, independently of its revolution around the Sun. Meanwhile, a solar day has an average
duration of 24 hours corresponding with the time interval passing between two culminations of
the Sun on a given meridian. This positive difference of 3 minutes and 56 seconds is due to the
revolution of the Earth around the Sun, leading to a rotation of more than 360 degrees of the
former.

A CELESTIAL GLOBE INDICATING THE CONSTELLATIONS OF THE ZODIAC
The celestial globe of Cosmos, whose mechanism is based on the duration of a sidereal day, is an
astronomical globe indicating the constellations of the Zodiac. It is composed of 12 constellations
which showcase their very own combination of stars. Their arrangement recalls the astrological
signs known today and divided into 12 periods of time throughout the year.
The Zodiac differs between astronomy and astrology due to the phenomenon called “precession
of the equinoxes”. It corresponds to the gradual change of direction of the Earth rotation axis,
resulting in a change of the stars position in the sky over the years. The astronomical calendar
of the zodiac thus refers to the stars that are actually visible in the sky at a given time, unlike the
astrological one that is invariant over time.
The current zodiacal constellation is the one that is placed behind the sun when it is 12 o’clock
solar time, referred to as “the sun passage through the constellation”. Invisible to the naked eye
because of the solar light diffusion in the atmosphere, the constellation is revealed by the celestial
globe of Cosmos.
Taurus
Aries Pisces
Aquarius
Capricorn
Sagittarius
Scorpio
LibraVirgo
Leo
Cancer
Gemini

ZODIAC CONSTELLATIONS SETTING TABLE
April 19
-
May 13
May 14
-
June 21
July 21
-
August 10
September 17
-
October 30
November 21
-
December 18
January 21
-
February 16
March 12
-
April 18
June 22
-
July 20
August 11
-
September 16
October 31
-
November 20
December 19
-
January 20
February 17
-
March 11
TaurusAries PiscesAquariusCapricornSagittariusScorpioLibraVirgoLeoCancerGemini

April 19
-
May 13
May 14
-
June 21
July 21
-
August 10
September 17
-
October 30
November 21
-
December 18
January 21
-
February 16
March 12
-
April 18
June 22
-
July 20
August 11
-
September 16
October 31
-
November 20
December 19
-
January 20
February 17
-
March 11
TaurusAries PiscesAquariusCapricornSagittariusScorpioLibraVirgoLeoCancerGemini

SETTING MECHANISM
The setting mechanism features an exclusive system developed by Girard-Perregaux’s R&D
department. Instead of relying on a traditional crown on the case side, the setting system is based
on four rotating bows, called “bélières”, placed at the back of the timepiece.
Warning: The winding, the setting of the time, the day/night indicator and the zodiac constellations
indicator are unidirectional. To wind your watch and set the functions, pull the bélières up, make sure
to turn them clockwise and push them down to their original position once the setting is finished.
TIME SETTING BÉLIÈRE
WINDING BÉLIÈRE
ZODIAC CONSTELLATIONS
INDICATOR BÉLIÈRE
DAY/NIGHT
INDICATOR BÉLIÈRE

TRIPLE FOLDING BUCKLE OPENING
In order to provide an easy access to the setting mechanism, the triple folding buckle is removable
thanks to an opening system. First, open the triple folding buckle by pressing on both push-buttons
number 1, then, open the security system by pressing on both push-buttons number 2.
Warning: After finishing the setting, make sure to secure the buckle again by replacing, from
above, the unleashed part in its original position.
11
22

WINDING
The winding bélière is placed at the back of the watch at the bottom center.
Manual-winding:
Your watch requires regular winding to work normally. To wind, pull the bélière up and turn it
clockwise 11 times for a full winding. Once the watch is wound up, push the bélière down to its
original position.
When fully wound, your watch has a power reserve of minimum 57 hours.
Warning: Do not force the bélière once the resistance increases as this could damage the
movement.
SETTING THE TIME
The time setting bélière is placed at the back of the watch at the top center.
Pull the bélière up and turn it clockwise. Once the time is set, push the bélière down to its original
position.
SETTING THE DAY/NIGHT INDICATOR
The day/night indicator bélière is placed at the back of the watch on the left-hand side.
Pull the bélière up and turn it clockwise to align the mark “12” of the graduated ring with the
location where it is 12 o’clock. The terrestrial globe acts as a day/night indicator as the day appears
on the dial side and the night on the case-back. Once the day/night indicator is set, push the bélière
down to its original position.

SETTING THE ZODIAC CONSTELLATIONS INDICATOR
The Zodiac constellations setting bélière is placed at the back of the watch on the right-hand side.
Warning: Before making any setting, set the time at 12 o’clock. For a better accuracy, set the
time at 12 o’clock solar time as it coincides with the time when the Earth and the Sun are aligned
with the current constellation. To do so, convert the local time into the solar time by taking
into consideration your time zone, your location, the equation of time and the current season
(summer/winter time).
Pull the bélière up and turn it clockwise until the current constellation is positioned at noon. Match
the current date with the Zodiac constellations setting table on the previous pages and align the
globe with the middle of the constellation.
Once the zodiac constellations indicator is set, push the bélière down to its original position and
adjust the time setting.

GIRARD-PERREGAUX GP09320
HAND-WOUND MECHANICAL MOVEMENT
Diameter: 37.85 mm (163/5’’’)
Frequency: 21,600 Vib/h – (3 Hz)
Jewels: 52
Power reserve: minimum 57 hours
Functions: tourbillon, hours, minutes, day/night indicator, zodiac
constellations indicator
CASE
Diameter: 47.00 mm
Crystal: sapphire anti-reflective ‘box’
Case-back: sapphire crystal
Water resistance: 30 meters (3 ATM)
FUNCTIONS
a | Hours
b | Minutes
c | Day/night indicator
d | Tourbillon
e | Zodiac constellations indicator
a b
c
d
e

MDE-1025
Place Girardet 1 · 2301 La Chaux-de-Fonds · Suisse
T [phone] · F [phone]
www.girard-perregaux.com