Audemars Piguet Royal Oak Concept GMT Tourbillon Instructions For Use Manual - page 11
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Twin-barrel system
The rapid-rotation twin-barrel system – with a
maximum number of revolutions restricted to 19.75 –
guarantees constant force during the full ten days
of autonomy, thus ensuring enhanced efficiency and
improved timekeeping. This is because the power
reserve actually provided by the twin parallel-mounted
bridges is equivalent to twelve days. However, an
ingenious locking system – in the zones indicating
full (C–D) and low (A–B) charge levels – concentrates
the watch operation on the ten days of medium
level running, which are the most regular (B–C), the-
reby ensuring optimal efficiency.
The 19.75 winding revolutions of each barrel – a well-
above-average figure – are facilitated by the use of
a particularly thin spring. This specif ic feature
ensures far more flexible and regular transmission of
energy to the gearwheels, resulting in higher rating
precision and reliability.
1 jour ¾
10 jours
¼ jour
1 day ¾
10 days
¼ day
1 Tag ¾
10 Tage
¼ Tag
1 giorno ¾
10 giorni
¼ giorno
1 día ¾
10 días
¼ día
1
день ¾
10
дней
¼
день
1
日 ¾
10
日
¼
日
1
天 ¾
10
天
¼
天