iwc Da Vinci Chronograph Mode D'emploi page 18

Technical refinements of the Da Vinci Chronograph
Your IWC watch shows you the time in hours, minutes, seconds and 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 and a
power reserve of approximately 68 hours when fully wound. Your Da Vinci
Chronograph is protected by a sapphire glass of hardness grade 9 on the
Mohs scale that is convex on one side. Your watch is waterresistant 3 bar.
To ensure that this extraordinary watch continues to perform its tasks in
the future, it is essential to observe a few important operating
instructions.