Seiko 8R39 Manual - Page 6

English * There is no need to turn the crown further when the mainspring is fully wound. But the crown can be turned without damaging the watch mechanism. * Once the watch is wound up fully, it operates for about 45 hours. However, when the stopwatch is used continuously for a certain period, the watch may not operate for as long as 45 hours. * If the watch is used without being wound up fully, gain or loss of the watch may result. To avoid this, wear the watch for more than 10 hours a day. If the watch is used without being worn on the wrist (if it is used on the desk like a clock, for example), make sure to wind it up fully every day at a fixed time. * If the watch has stopped with the mainspring unwound, winding the mainspring with the crown will not start the watch immediately. This is because the mainspring torque (force) is low at the beginning of its winding due to the characteristics of mechanical watches. The small second hand starts to move when a certain degree of strong torque is reached after the mainspring has been wound up. However, swinging the watch from side to side to forcibly turn the balance can start the watch sooner. 10 HOW TO SET THE TIME AND DATE • Check that the watch is operating, and then set the time and date. • The watch is provided with a date function and is designed so that the date changes once every 24 hours. The date changes around 12 o'clock midnight. If AM/PM is not properly set, the date will change around 12 o'clock noon. 1. Pull out the crown to the first click. (The small second hand continues moving and the accuracy of the watch is unimpaired.) 2. The date can be set by turning the crown counterclockwise. Turn it until the previous day's date appears. Ex.)If today is the 6th of the month, first set the date to "5" by turning the crown counterclockwise. CAUTION • Do not set the date between 8:00 p.m. and 2:00 a.m. If you do so, the date may not change properly on the following day or malfunction of the watch may occur. 11 English