iwc IW3931 User manual

www.iwc.com
OPERATING INSTRUCTIONS
使用说明
使用說明
取扱説明書
PETUNJUK PENGGUNAAN
ИНСТРУКЦИЯ ПО ЭКСПЛУАТАЦИИ
КЕРІВНИЦТВО З ВИКОРИСТАННЯ
REF. 3931
DA VINCI
TOURBILLON RÉTROGRADE
CHRONOGRAPH
REFERENCE 3931
IWE07134/01.17/0.1

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OPERATING INSTRUCTIONS
English
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使用说明
简体中文
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使用說明
繁體中文
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取扱説明書
日本語
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PETUNJUK PENGGUNAAN
Bahasa Indonesia
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ИНСТРУКЦИЯ ПО ЭКСПЛУАТАЦИИ
Русский
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КЕРІВНИЦТВО З ВИКОРИСТАННЯ
Українська
DA VINCI TOURBILLON RÉTROGRADE CHRONOGRAPH

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DA VINCI TOURBILLON RÉTROGRADE CHRONOGRAPH
Welcome to the small
circle of individuals who, if we are to
be absolutely precise, demand slightly
more of a watch than absolute preci-
sion. Appreciation of a watch is more
than mere appreciation of the correct
time. It is enthusiasm for an ingenious
idea. For the interplay between preci-
sion and imagination. Between time
and timelessness. Between bounda-
ries and infinity. Between laws to which
the entire world is subject, and taste,
which cannot be dictated to anyone.
That is why, since 1868, we have been
devoting rather more of our time to
watches that must not only run with
absolute precision but which also, with

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DA VINCI TOURBILLON RÉTROGRADE CHRONOGRAPH
every passing second, exert a fascin-
ation with the great achievements of
master craftsmanship: a fascination
with new inventions of a technical,
material or formal nature, even if they
are concealed in minute details that are
perhaps not even visible. You are now
the owner of a beautiful new example
of this IWC tradition. We would like to
congratulate you on your choice and
send you our best wishes for the time
you will spend with your watch, which
perhaps cannot be described with any
greater accuracy than it is here.
IWC MANAGEMENT

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DA VINCI TOURBILLON RÉTROGRADE CHRONOGRAPH
THE TECHNICAL
REFINEMENTS OF THE
DA VINCI TOURBILLON
RÉTROGRADE
CHRONOGRAPH
Your IWC watch shows you the time
in hours and minutes and the retro -
grade date. You can use the integrated
flyback chronograph to measure any
period of time in seconds, minutes
and hours. Stop times can be added
together. The mechanical movement
with automatic winding has a power
reserve of approximately 68 hours
when fully wound. Your Da Vinci
Tourbillon Rétrograde Chronograph is
protected by an arched-edge sapphire
glass of hardness grade 9 on Mohs’

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DA VINCI TOURBILLON RÉTROGRADE CHRONOGRAPH
scale. Your watch is shockproof and
water-resistant 3 bar. The engraved
rotor made of 18-carat red gold winds
the watch in both directions of rotation
via IWC’s double-pawl winding. Your
watch is equipped with a flying minute
tourbillon, a unique micro-mechanism
that minimizes the effect of gravity
on the accuracy. The tourbillon, an
invention made in the aftermath of the
French Revolution, has always been
regarded as the ultimate challenge
in the quest for absolute mechanical
watchmaking precision. More specific-
ally, the purpose of the mechanism is
to counterbalance the one-sided pull
of the earth’s gravity on the balance.

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DA VINCI TOURBILLON RÉTROGRADE CHRONOGRAPH
This is because the residual gravita-
tional error of the balance influences
the accuracy, depending on the pos-
ition of the watch. Fortunately, there
is a way to overcome this problem
caused by one of the basic laws of
physics: the balance, the pallets and
the escape wheel are mounted in
a minute cage that rotates around
itself once every minute. In this way,
the effect of the gravitational error is
practically eliminated. To ensure that
this extraordinary watch continues to
perform faultlessly in the future, it is
essential to observe a few important
operating instructions.

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DA VINCI TOURBILLON RÉTROGRADE CHRONOGRAPH
1Hour hand
2Minute hand
3Chronograph
seconds hand
4Date display
5Minute counter
Hour counter 6
Start/stop push-button 7
Reset/flyback 8
push-button
Tourbillon 9
Crown 10
S
W
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S
M
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10
2
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6
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