Orient KU(RMC) Instruction Manual page 18

◆ HOW TO USE THE ROTATING INDICATOR BEZEL
Please notice that some models come with a rotating
indicator bezel, which should be used properly.
Turn the bezel by pointing the  mark to the minute
hand.
While certain time goes by, you can measure the
elapsed time from the distance between minute hand
and figures on the rotating indicator bezel.
You can also set the  mark as a desired time to
remind you how long time is still remain for an
appointment.
You cannot turn the bezel reversely since it comes
with a protection mechanism for preventing wrong
operation by force or shock. Figures on the bezel could also help you to read
the current time easily.
* Depending on design, anti-reversely and 1 minute "click" sound mechanism
on rotating indicator ring does not apply to some models.
18
Rotating indicator bezel
The above shows
that 20 minutes have
elapsed from 10:10.