PURPOSE: To enable organic combination of the both functions of world time and alarm, by returning the display to the basic time if the operation time of display mode selection switch is more than a given time.

CONSTITUTION: When the selection button 2 is operated, the display is sequentially selected to the home time mode, world time mode, alarm set mode, home zone set mode, and time set mode display. The input continuous state of the button 2 is measured in the watch and it is more than a given time such as 1W1.25 second, any mode is compulsively returned to the home time mode being the basic time display. With the constitution easily returned to the basic time display, the both functions of worked time and alarm are coupled. If the alarm time is set without calculating time difference at the home country and selected to the world time zone, a given time of alarm is made each country in case of world trip to constitute the watch ease of operation.