![background image](http://html1.mh-extra.com/html/omega/seamaster-aqua-terra-gold-and-steel/seamaster-aqua-terra-gold-and-steel_operating-instructions-manual_4227274035.webp)
34
Mechanical watches
Precision tolerances
3
OMEGA
mechanical watches with a certified chronome-
ter movement
OMEGA
watches bearing the chronometer inscription (in accor-
dance with the certificate issued by your authorised
OMEGA
retai-
ler) 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 move-
ment for 360 consecutive hours, during which it is placed in the
five common wrist positions and exposed to three different tem-
peratures.
To earn the title of chronometer, the mechanical movement’s ave-
rage 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.
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
U
Содержание Seamaster Aqua Terra Gold & Steel
Страница 1: ...E 10...