iwc IW3251 Operating Instructions Manual page 28

Reading the time in the dark
The dial as well as the hour and minute hands of your
watch are provided with luminous elements which per-
mit the time to be read without problem, even in total
darkness. The luminous element at 12.00 serves as a
reference point.
Water-resistance
Your IWC Official Agent must carry out a new water-
resistance test every time your IWC watch is opened
and serviced.
Recommendation: We recommend that you have your
watch's water-resistance tested once a year by an ap-
proved IWC Official Agent.
Adjusting the metal bracelet
If you have decided on a metal bracelet, you can easily
adjust it to the size of your wrist. You can make this
adjustment yourself by removing or adding individual
bracelet links.