IWC Schaffhausen Portugieser Tourbillon Mystère Rétrograde Mode D'emploi page 14

— 1 4 —
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 u e s e 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
44 jewels (synthetic rubies) and a power reserve of approximately 7 days (168 hours)
when fully wound. Your Portuguese Tourbillon Mystère Rétrograde is protected by a
convex sapphire glass of hardness grade 9 on Mohs' scale. Your watch is shockproof
and water­resistant 3 bar. The engraved rotor with its 18­carat gold medallion winds
the watch in both directions of rotation via the Pellaton winding mechanism. Your
watch is equipped with a flying minute tourbillon, a unique micromechanism, which
minimizes the effect of gravity on the accuracy. 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 mechanical watchmaking precision. More specif­
ically, the purpose of the mechanism is to counterbalance the one­sided pull of the
earth's gravity on the balance. This is because the residual gravitational error of the
balance influences the accuracy, depending 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.
P o r t u g u e s e 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