Chens Men's Automatic Blue Dial Watch Rose Gold With Black Leather Strap Band For the automatic watch which has not been dressed for over 48 hours,the knob shall be rotated for at least 20 rounds to start the driving system of the movement. Water-resistant to 165 feet (50 M).This watch with a 24h dial and a second dial.Date in the position of 3 oclock. This watchs crown can be pulled out into two sections.The first section is for setting date,the second section is for setting time(both towards to inside). You can make a distinction between AM time and PM time via the hour dial.With Swiss-Automatic movement. Rose gold watch,316L stainless steel.Genuine Leather Band About how to set time:rotating the knob,at the time when the date jump to another day(it is 24 oclock or 0 oclock),you can set time.If it is AM now,just set the right time;but if it is PM,please firstly just keep the hour hands rotating for a whole circle then set pm time.