iwc 3723 User manual

www.iwc.com
AQUATIMER SPLIT MINUTE CHRONOGRAPH
REF. 3723
OPERATING INSTRUCTIONS
REF. 3723
IWA20853/02.09/0.1

Operating instructions
English
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Welcome to the small ci cle of individuals who, if we a e to be
absolutely p ecise, demand slightly mo e of a watch than absolute p ecision.
App eciation of a watch is mo e than me e app eciation of the co ect time.
It is enthusiasm fo an ingenious idea. Fo the inte play between p ecision
and imagination. Between time and timelessness. Between bounda ies and
infinity. Between laws to which the enti e wo ld is subject, and taste, which
cannot be dictated to anyone. That is why, since 1868, we have been devoting
athe mo e of ou time to watches that must not only un with absolute
p ecision but which also, with eve y passing second, exe t a fascination with
the g eat achievements of maste c aftsmanship: a fascination with new
inventions of a technical, mate ial o fo mal natu e, even if they a e concealed
in minute details that a e pe haps not even visible. You a e now the owne of
a beautiful new example of this IWC t adition. We would like to cong atulate
you on you choice and send you ou best wishes fo the time you will spend
with you watch, which pe haps cannot be desc ibed with any g eate accu acy
than it is he e.
IWC Management

Technical refinements of the
Aquatimer Split Minute Chronograph
Your IWC watch shows you the time in hours, minutes and seconds as well
as the date. With the integral chronograph, you can measure any period
up to 12 hours in seconds, minutes and hours. The duration of a dive can
be read on the bezel inside the case, which can be adjusted in an anti-
clockwise direction by turning the reset button. You can use the Split
inute function to mark the start of a decompression stop. The self-
winding mechanical movement has 30 jewels (synthetic rubies) and a power
reserve of at least 44 hours when fully wound. Your Aquatimer Split inute
Chronograph is shockproof, water-resistant 12 bar and is protected by a
sapphire glass of hardness grade 9 on oh’s scale. To ensure that this
extra ordinary watch continues to perform its tasks in the future, it is
absolutely essential to observe a few important operating notes.

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Key to the Aquatimer Split Minute Chronograph
1Hour hand
2inute hand
3Seconds hand
4Date indicator
5Screw-in crown
6Split inute hand
7Rocker switch
Split inute function
8Seconds stop hand
9inutes counter
10 Hours counter
11 Start-stop button
12 Reset button
13 Rotating inner bezel
with time graduation

Functions of the crown
XNormal position (screwed in)
0Winding position
1Date setting
2Time setting
Normal position
This watch has a screw-in crown. The screw-in connection (normal position,
position X) prevents unintentional adjustment of the time or the date, and the
watch case has double protection against penetrating water. To release the
secure crown, unscrew it by rotating it to the left, where it automatically
assumes position 0, the winding position. By depressing the crown in position X
and rotating it to the right at the same time, it is screwed down firmly again
and secured.
Winding position
In the winding position (position 0), you can also wind the automatic move-
ment by hand. The movement will start after only a few revolutions of the
crown. However, it is better to wind the movement fully with about 30 revolu-
tions of the crown, as maximum accuracy and a power reserve of about
44 hours will then be assured, even after taking off the watch.
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Setting the date
If a month has fewer than 31 days, you must set the date by hand to the first
day of the following month. To do this, release the screw-in crown and pull it
to position 1. You can now change the date by rotating the crown to the right
(quick setting).
Setting the time
Pull the crown to position 2. This will stop the movement. To ensure that the
set time is accurate to the second, it is best to stop the movement as the
seconds hand reaches 60. You can now position the minute hand exactly on
the minute line. To start the seconds hand, push the crown back to position 0.
When setting the time, please be aware that the date change always
takes place at midnight (24.00). If this change has already taken place at
12.00 (noon), you must move the hands forwards by 12 hours.

Setting your watch correctly
Set your watch correctly as follows:
•Release the crown by rotating it to the left.
•Wind the movement until it is fully wound (about 30 revolutions of
the crown).
•Pull the crown to position 1.
•Rotating the crown to the right causes the date indicator to change in
steps. Set yesterday’s date.
•Pull the crown to position 2, and this will stop the movement.
•Turn the hands forwards until the date indicator changes to today’s date.
The hands will now be positioned between 0.00 and 1.00 in the morning.
•Now set the precise time by turning the hands forwards; in the afternoon,
the hands must be turned past 12.00 (noon) once again.
•Push the crown back to position 0 to start the watch movement.
•Now push the crown to position X and secure it by rotating it to the right
at the same time.
Important: Although the watch is water-resistant in positions 0, 1 and 2,
the crown must nevertheless always be screwed down again for normal use
(position X).
Reading the time in the dark
The dial, the hour and minute hands as well as the marking on the rotating
inner bezel of your watch are provided with luminous elements which
permit the time to be read without problem, even in total darkness. The
luminous point at 12.00 serves as a reference point.