Audemars Piguet Calibre 2385 Selfwinding Instructions For Use Manual - page 7
30
31
The 2385 automatic chronograph
ircumstances and events regularly cause us to
measure a fixed amount of time between two
actions. This makes the chronograph an indispensable
instrument. It was invented by two watchmakers from
the Vallée de Joux, Henri-Féréol Piguet and Adolphe
Nicole, who devised and created the system.
The Audemars Piguet Chronograph is a wrist watch
which rewinds automatically. The movements of the
wearer’s wrist generate the energy required for it to
function.
The kinetic energy is supplied by an oscillating weight
with 18-carat gold segment and is transmitted to the
mainspring via a wheel train. As it gradually winds
around the barrel-arbor, the spring accumulates energy
that is then transmitted to the watch movement at a
steady rate.
The maximum power reserve is reached after a period
of time varying from several hours to some days,
depending on the owner and the amount of physical
activity.
To prevent overtensioning, the barrel spring is released
at just the right moment by a sophisticated system.
1. Intr
oduction
Eng
lis
h
C