Orient RA-AA0001B Manual De Instrucciones página 18

 HOW TO USE SIMPLE THE WORLD TIME
Using the rotating bezel or the internal rotating indicator ring, you can easily
know the time in each city by the dial or the display on the exterior.
In the figure, the internal rotating indicator ring displays the time divided
into 24 parts.
* The expression method of world time differs depending on the model.
In order to set and display the world time, there are those that display the
time and city interchanged, and those that use a rotating bezel.
Turn the crown for the internal rotating indicator ring, set the current time to
the city displayed on the dial.
If the time in Tokyo is 10:08 (example), set 10 on the internal rotating
indicator ring to TOKYO on the dial. At this time, the time in each the city will
be the time corresponding to the number on the internal rotating indicator
ring.
Internal rotating indicator ring
18
<Displaying the city name>
Crown for the internal
rotating indicator ring
Match "10" to "TOKYO"