Seiko 9R15, 9R65 manual Names of the chronograph parts and their function, Screw-lock type button

Chronograph (For Cal. 9R86, 9R84)

A chronograph is a watch that has a stopwatch function in addition to a time display function.

This watch features a stopwatch function which can measure time up to 12 hours.

Before using the stopwatch function

①Make sure that the mainspring is sufficiently wound. Ensure that the power reserve indicator shows a full-wound state of the mainspring. When using the stopwatch, ensure that the watch is working.

②Make sure that the center chronograph second hand is pointing at the 0 position. If it is not pointing at the 0 position, press the RESET button.

※Do not pull out the crown while the stopwatch function is operating, as doing so will stop the measurement.

Names of the chronograph parts and their function

Chronograph minute hand

Center chronograph	START/STOP
second hand	button

Screw-lock type button

Some models may have a START/STOP button and RESET button with

ascrew-lock mechanism. Buttons with a screw-lock mechanism are equipped with a button ring. To operate the screw-lock type buttons, turn the button ring first to unlock it.

※This procedure is not necessary for watches without screw-lock type buttons.

※Turn the button all the way until the slide cover descends and the button ring can no longer be turned. Once you finish turning the button completely, the button becomes fully unlocked.

Screw-lock type button is	Screw-lock type button is
locked.	unlocked.
Slide cover	Guide line

Button ring Button ring

How to use the screw-lock type button

How to unlock	How to lock
To	To
	fasten
loosen

English

12-hour dial Chronograph hour hand

RESET button

※The orientation and design of the display may vary depending on the model.

※Some models may have screw-lock type buttons.

⇒ "How to use the screw-lock type button" page 21.

Turn the button ring until it stops

Turn the button ring counterclockwise (downward) to lower the slide cover gradually. Turn the button ring further until you can clearly see the guide line and the button ring can no longer be turned. Now the screw-lock type button is unlocked and can be operated.

Turn the button ring until it stops

Turn the button ring clockwise (upward) until it stops. Now the screw-lock type button is completely locked. Once you have finished operating the button, make sure that you relock it.

※Foreign particles and contamination can cause operational failure of the screw and/or button(s).

⇒ "Daily care" page 37.

20 Chronograph (For Cal. 9R86, 9R84) 21