iwc AQUATIMER CHRONOGRAPH Operating Instructions Manual page 12

Reading the time in the dark
The dial, the hour and minute hands as well as the
marking on the rotating bezel of your watch have lumi-
nescent elements that allow you to read the time
effortlessly even in total darkness. The two luminescent
elements at 12 o'clock serve as a reference point.
Reading the chronograph
Chronograph seconds hand: The scale for the central
chronograph seconds hand runs around the edge of the
dial.
Minute and hour counters: The subdial at 12 o'clock
has two hands, which run continuously and show the
elapsed time on a 12-hour and a 60-minute scale. The
hour and minute counters can be read like a standard
analogue time display. In other words, one revolution
of the minute counter is equal to 60 minutes, and one
revolution of the hour counter is equal to 12 hours.