[. . . ] How to use your Longines chronograph As a watch, the chronograph shows the hours, minutes, seconds and the date. [. . . ] Pulled half-way out Setting the date: Turn the crown backwards to change the date, then push the crown against the case. You need to correct the date at the end of months with fewer than 31 days. Pulled right out Setting the time to the second: The small seconds-hand stops when you pull the crown out as far as it will go. To restart the seconds at a broadcast or telephone time signal, push the crown back in against the case. Important: Should your chronograph need repair, it should be sent to a Longines agent only. Making sure your watch is water-resistant Your chronograph is water-resistant. [. . . ] Ask for its water-resistance to be checked when you have your watch serviced. [. . . ]