Timex Intelligent Quartz Manual page 243

SETTING THE CASE ROTATING TOP RING
(TIME ZONE III)
The 3rd time zone is set by using the existing setting of
the 4th center hand and adjusting the case rotating top
ring to the desired time of the 3rd time zone. (Please note:
this scale is a 24-hour format). The top ring has 72 posi-
tions. To advance the top ring one hour you will advance
it three positions (3 "clicks"). Note the current time in the
location you wish to track as the 3rd time zone. Rotate
the case top ring counter clockwise to position the cor-
rect hour marker for that time with the 4th center hand.
107