Citizen Movement Caliber C660 Setting Instructions Manual page 11

<Using The Auto Chronograph Measurement>
When the race timer measurement is finished, upon finishing simultaneously, it
changes to the auto chronograph that starts counting down automatically. The auto
chronograph measures to a maximum of 23 hours, 59 minutes and 59 seconds in 1-
second increments. After timing is finished, the chronograph automatically
returns to the RACE timer initial setting display.
1. Pressing button (A) during measurement repeatedly starts and stops the auto
chronograph each time it is pressed.
a. When starting the Auto Chronograph, the second hand starts moving
clockwise in conjunction.
2. Pressing button (B) during measurement of the auto chronograph returns the
auto chronograph to the race timer initial display.
3. Pressing button (B) while the chronograph is stopped returns the chronograph
to the race timer initial setting display
a. The second hand rapidly advances to the 12:00 position and then stops
b. The function hand rapidly advances to the race timer initial setting
position and then stops
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