![background image](http://html1.mh-extra.com/html/omega/1376/1376_operating-instructions-manual_4218442020.webp)
34
35
En
gl
is
h
Mechanical watches
Precision tolerances
3
OMEGA
mechanical watches with a certified chronometer
movement
OMEGA
watches bearing the chronometer inscription (in accordance
with the certificate issued by your authorised
OMEGA
retailer) are
high-precision timepieces that have passed the precision tests of the
Official Swiss Chronometer Testing Institute (Contrôle Officiel Suisse
des Chronomètres, COSC).
This neutral and independent body individually tests each movement
for 360 consecutive hours, during which it is placed in the five common
wrist positions and exposed to three different temperatures.
To earn the title of chronometer, the mechanical movement’s average
daily variation in rate must be between -4/+6 seconds per day, or a
precision of 99.99%, the highest precision attainable by a mechanical
movement.
U
9, 10
1, 2
7, 8
3, 4
5, 6
13
23°C
38°C
12
23°C
23°C
14, 15
23°C
23°C
11
23°C
8°C
23°C
Temperature
Temperature
Days
Days
Position
Position
Quartz watches
Precision tolerances
3
The precision of a mechanical movement depends on the individual
habits of the wearer and can therefore vary. A qualified
OMEGA
watchmaker can adjust the precision of a watch to within the
OMEGA
tolerances, which are from -1 to +6 seconds per day.
Other
OMEGA
mechanical watches
Watches without chronometer certification (COSC) have average
precision tolerances of between -1 and +11 seconds per day.
The precision of a mechanical movement depends on the individual
habits of the wearer and can therefore vary. A qualified
OMEGA
watchmaker can adjust the precision of a watch to within the
OMEGA
tolerances.
Quartz watches
All
OMEGA
quartz movements are produced in accordance with
OMEGA
’s highly renowned procedures and quality standards. Ambient
temperature may affect the precision of quartz movements, which can
lead to variations of between -0.5 and +0.7 seconds per day.
Quartz watches with thermocompensation
This movement is fitted with an electronic module that compensates
for the effects of temperature on the movement’s precision. These
watches are accurate to /- 0.055 seconds per day.
The precision of a mechanical watch cannot be compared to that of a
quartz watch, given that the two are based on different technologies.
U
01-OMEGA_V14-I_EN.indd 34-35
16/05/12 14:01:20
Summary of Contents for 1376
Page 1: ...E 14...