IWC Schaffhausen Da Vinci Mode D'emploi page 18

Technical refinements of the Da Vinci Perpetual Calendar
Digital Date-Month
Your IWC watch shows you the time in hours, minutes and seconds with
analogue hands, the date and month in a large digital display, and leap
years. With the help of the integrated chronograph, you can measure any
time span in seconds, minutes and hours. The stop times can be accu-
mulated. The mechanical movement with automatic winding mechanism
has 52 jewels and a power reserve of at least 68 hours when fully wound.
Your Da Vinci Perpetual Calendar Digital Date-Month is protected by a
sapphire glass of hardness grade 9 on the Mohs scale, which is convex on
one side. Your watch is water-resistant 3 bar. In addition to the uniqueness
of its functions, the simplicity of its operation and the legibility of its
displays also make this watch stand out from all the other complicated
watches. To ensure that this extraordinary watch can perform its tasks,
it is essential to observe a few important operating notes.