press and hold the upper start button it will redirect you to set the time
press and hold both right-side buttons at the same time. After the beep round alarm indicator will become dark. This will set alarm sound (on/off). I'm not sure what model you are having but this works for Quamer SD-288.
press right side down button for few minutes den u will be shown change of hours By using left side down button and right side upper button u can change d time
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digitel time set
To set the time on a Gucci wrist watch you simply pull the crown out to the middle position. You can then move the time clockwise or counter clockwise to set the correct time. Once you have the time set, push the crown back in to start the watch.
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Breitling watch info at link
depends on the watch.
as simple as that
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