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P o r t u g i e s e r t o u r b i l l o n M y s t è r e r é t r o g r a d e
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 P o r t u g i e s e r t o u r b i l l o n M y s t è r e r é t r o g r a d e
Your IWC watch shows you the time in hours and minutes, the retrograde date to
gether with the power reserve. The mechanical movement with automatic winding has
a power reserve of approximately 7 days (168 hours) when fully wound. Your Portugieser
Tourbillon Mystère Rétrograde is protected by an archededge sapphire glass of hard
ness grade 9 on Mohs’ scale. Your watch is shockproof and waterresistant 3 bar.
The engraved rotor made of 18carat red gold winds the watch in both directions of
rotation via the Pellaton winding system. Your watch is equipped with a flying minute
tourbillon, a unique micromechanism, which minimizes the effect of gravity on the ac
curacy. 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 mech
anical watchmaking precision. More specifically, the purpose of the mechanism is to
counterbalance the onesided pull of the earth’s gravity on the balance. This is be
cause the residual gravitational error of the balance influences the accuracy, depend
ing on the position 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.
