IWC Schaffhausen BIG PILOT'S HERITAGE 55 Mode D'emploi page 18

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T H E T E C H N I C A L R E F I N E M E N T S O F T H E
B I G P I L O T ' S H E R I T A G E W A T C H 5 5
Your IWC watch shows you the time in hours, minutes and seconds.
The watch is water-resistant 6 bar and protected by an antireflect-
ive sapphire glass of hardness grade 9 on Mohs' scale. The glass is
retained securely in the case at low pressure, for example when a
drop in air pressure occurs at extreme altitudes. The soft-iron inner
case ensures protection against magnetic fields. The mechanical
movement is specially engraved and decorated and has a power
reserve of 46 hours when fully wound. To ensure that this extraor-
dinary watch continues to perform its tasks in the future, it is essen-
tial to observe a few important operating instructions.
B I G P I L O T ' S H E R I T A G E W A T C H 5 5