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Technical refinements of the Pilot's Watch/
Spitfire Mark XVI
Your IWC watch shows you the date and the time in hours,
minutes and seconds. The watch case is water-resistant
up to 60 metres (according to standard ISO 2281) and is
protected by a sapphire glass of hardness grade 9, which
is secured against displacement from a drop in air pres-
sure at extreme altitudes. The water-resistance rating of a
watch in metres is a theoretical value, which must not be
confused with the depth of a dive. The mechanical move-
ment with automatic winding has 21 jewel bearings
(synthetic rubies) and has a power reserve of 42 hours
when fully wound. The soft iron inner case ensures optimal
protection against magnetic fields. To ensure that this
extraordinary watch continues to perform its tasks in
future, it is essential to follow a few important operating
instructions.
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