iwc DA VINCI CHRONOGRAPH CERAMIC Mode D'emploi page 16

The technical refinements of the Da Vinci Chronograph Ceramic
Your IWC watch shows you the time in hours, minutes and seconds, together
with the date. You can use the integrated flyback chronograph to measure
any period in seconds, minutes and hours. Stop times can be added together.
The mechanical movement with automatic winding has 40 jewels (synthetic
rubies) and a power reserve of approximately 68 hours when fully wound.
Your Da Vinci Chronograph Ceramic is protected by a convex sapphire glass
of hardness grade 9 on Mohs' scale. Your watch is water-resistant 3 bar. To
ensure that this extraordinary watch continues to perform faultlessly in the fu-
ture, it is essential to observe a few important operating instructions.