PURPOSE: To facilitate location of an area by displaying a desired portion of a world map upon a watch surface and its standard time.

CONSTITUTION: A watch surface is so constructed that one of the world maps having their at least one portion divided can be interchangeably displayed and that any region of the world can be displayed on one of the divided world maps. There is arranged at another portion an electo-optical display device 8 which is so constructed as to digitally display the time. There are further provided control means including an electronic circuit having a world watch system for displaying selectively one desired district in a map and the time corresponding thereto in the time display section 5 of the display device in addition to an operating switch 3.