How To Use The Button; Crown; Before Use - Seiko C-21 Instructions Manual

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● Reception level display
1
[Manual reception]
H : High reception level (50-second
position)
L : Low reception level (40-second
position)
N : Unable to receive radio signals
(20-second position)
* Reception level display → P.71
● Standard radio signal display
Display (Country with radio
Display position
signal transmitting station)
J / JJY (Japan)
23-second position
B / BPC (China)
21-second position
W / WWVB (U.S.A.)
43-second position
D / DCF77 (Germany)
3-second position
M/MSF (UK)
0-second position
* World time function → P.29
12
EN
1
There are two types of crowns, a normal crown and a screw down crown.
Please check the type of the crown of your watch.
While
The
pressing the

crown

crown in, turn it
turns.
in the direction
indicated by
the arrow.
The crown
Unlock the crown before
operating it.
does not
turn.
Unscrew
* By locking the crown by screw, a screw down crown can prevent malfunction and increase water resistance.
* Be careful not to screw the crown in by force as it may damage the slots of the crown.
14
EN
● Reception result
display
[Check of reception result]
Y : Reception successful
(10-second position)
N : Reception failed (20-second
position)
* How to display the reception results
→ P.27
● Time zone display
[Time zone selection]
City names : 25 regions around the world
* How to select the time zone (How to display the local
time around the world) → P.31
* Time zone display and time difference table → P.33
* Indication on the bezel or positions of each item on the
dial may vary depending on the model (design).
Crown
Normal crown
Pull out the crown and operate it.
Screw down crown
After operating the crown,
lock it.
Rotate while
pressing
the crown in.

How to use the button

Some models may have a button which is recessed in the watch case to prevent accidental input.
Shape of the button differs depending on the design of the watch.
Upper half of the
Button B has an outer
Normal Button
Button B is covered.
ring.
1. Turn the outer ring
counterclockwise
(to a downward
direction) to loosen
Use an object with a
it.
long tapered tip.
Press the button with
* You can also press the
2. Press the button
your finger
lower half of the button
with your finger.
with your finger.
* After finishing the
operation, make sure
to relock the outer ring
by turning it clockwise.

Before Use

1
Checking the Charging Status
When the movement of the seconds hand shows an energy depletion state, the battery requires
charging.
The seconds hand moves
The watch is
at one-second intervals.
sufficiently charged.
The seconds hand moves
at two-second intervals.
The charged energy is depleted.
→ P.42
The seconds hand moves
at five-second intervals.
The power save function is activated. → P.43
Check the movements of the seconds hand
The seconds
after releasing the Power Save mode.
hand is stopped.
The energy stored in the watch runs low.
* If the seconds hand does not move at one-second intervals even after fully charging the battery, refer to
"Charging the solar battery" in Troubleshooting on P.90
Button B is covered
Button B is embedded
except the hollow in the
in the watchcase.
middle of the button.
Button ring
Press the button using an object with a long
tapered tip.
EN
Charge the
battery
sufficiently.
How to charge
the battery
→ P.40
EN
1
13
2
15

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