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Characteristics
This watch is equipped with Seiko’s unique mechanism “Spring Drive”, and provides the following
features.
Spring Drive
Spring Drive, the unique mechanism made available only by Seiko technology, achieves a high
precision comparable to that of a quartz watch while using the unwinding power of the mainspring
as its sole power source.
Self-winding
mechanism....................
→ P. 13
This is a mechanism that uses the natural motion of your arm as the power
source to wind the mainspring to power the watch.
Manual-winding
mechanism......................
→ P. 14
This is a mechanism that enables you to wind the mainspring by turning
the crown by hand to power the watch. This function is convenient
especially for winding the mainspring when you start using the watch.
Power reserve
indicator........................
→ P. 15
The power reserve indicator shows the winding state of mainspring
(continuous operating time).
The watch keeps working for approximately 72 hours (approximately three
days) with its mainspring in fully wound state.
Glide motion..............
The seconds hand of the watch moves around the dial in a perfectly smooth
movement.
EN 8
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HOW TO USE
Function and Performance
Time difference
adjustment function.......
(5R66 only) → P. 31
When you move to a location having different time zone, you can easily set
the watch to indicate the local time.
bCAUTION
This watch is powered by the mainspring. To ensure constant operation of the watch, be
sure to wind up the mainspring sufficiently before the power reserve indicator points to
“0.”
The watch may stop if the power reserve indicator is showing less than one-sixth,
especially it is left under a temperature below 0 °C.
EN 9
1
HOW TO USE
Names of the parts and their functions
5R65
1Minute hand
2Hour hand
3Seconds hand
4Power reserve indicator
Displaying the continuous operating time
→ P. 15
5Date
→ P. 26
6Crown
Normal position (not locked): Wind up the
watch (hand-wound)
First click position: Time difference
adjustment/ Date setting
Second click position: Time setting
* The position and design of the display may vary depending on the model.
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EN 10
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HOW TO USE
5R66
1Minute hand
2Hour hand
3Seconds hand
4Power reserve indicator
Displaying the continuous operating time
→ P. 15
524-hour hand
6Date
→ P. 26
7Rotating bezel
With simple compass → P. 35
With 24-hour scale → P. 37
8Crown
Normal position (not locked): Wind up the
watch (hand-wound)
First click position: Time difference
adjustment/ Date setting
Second click position: Time setting
* The position and design of the display may vary depending on the model.
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EN 11
1
HOW TO USE
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