iwc AQUATIMER CHRONOGRAPH Operating Instructions Manual page 6

The technical refinements
of the Aquatimer Chronograph
Your IWC watch shows you the time in hours, minutes
and seconds, together with the date. You can use
the integrated chronograph to measure any period in
seconds, minutes and hours. Stop times can be added
together. Dive time is read off on the external rotating
bezel, which for safety reasons can only be turned
anticlockwise. The mechanical movement with auto-
matic winding has 40 jewels (synthetic rubies) and
a power reserve of approximately 68 hours when fully
wound. Your Aquatimer Chronograph is shockproof,
water-resistant 12 bar and protected by sapphire glass
of hardness grade 9 on the Mohs' scale. To ensure that
this extraordinary watch continues to perform faultlessly
in the future, it is essential to observe a few important
operating instructions.