If your watch has Lumibrite
Lumibrite is a luminous paint that absorbs light energy of the sunlight and lighting apparatus in a short
time and stores it to emit light in the dark. For example, if exposed to a light of more than 500 lux for
approximately 10 minutes, Lumibrite can emit light for 3 to 5 hours. Please note, however, Lumibrite
emits the light it stores, the luminance level of the light decreases gradually over time. The duration of
the emitted light may also differ slightly depending on such factors as the brightness of the place where
the watch is exposed to light and the distance from the light source to the watch.
* In general, when you enter a dark place from a bright environment, your eye cannot adapt to the
change in light levels quickly. At first, you can hardly see anything, but as time passes, your vision
gradually improves. (Dark adaptation of the human eye)
* Lumibrite is a luminous paint that is completely harmless to human beings and the natural
environment; containing no noxious materials such as radioactive substance.
Reference data on the luminance
Condition Illumination
Sunlight Fine weather 100,000 lux
Cloudy weather 10,000 lux
Indoor (Window-side
during daytime)
Fine weather more than 3,000 lux
Cloudy weather 1,000 to 3,000 lux
Rainy weather less than 1,000 lux
Lighting apparatus
(40-watt daylight
fluorescent light)
Distance to the watch: 1 m 1,000 lux
Distance to the watch: 3 m 500 lux (average room luminance)
Distance to the watch: 4 m 250 lux
Troubles Possible Causes Solutions
The watch stops operating. The mainspring has not been
wound.
Turn the crown to wind the mainspring
and reset the time. While you are
wearing the watch or when you take it
off, check the remaining power shown
by the power reserve indicator and
wind the mainspring if necessary.
The watch stops even
though the power reserve
indicator is not showing “0”.
The watch has been left at a
low temperature (below
0°C).
Turn the crown to wind the mainspring
and reset the time. At a temperature
below 0ºC, the watch may stop if the
power reserve indicator is showing
less than one-fifth of the power
reserve.
The watch temporarily loses/
gains time.
The watch has been left in
extremely high or low
temperatures for a long time.
Return the watch to a normal
temperature so that it works accurately
as usual, and then reset the time. The
watch has been adjusted so that it
works accurately when it is worn on
your wrist under a normal temperature
range between 5ºC and 35ºC.
The watch was brought into
close contact with a
magnetic object.
Correct this condition by moving and
keeping the watch away from the
magnetic source, and reset the time. If
this action does not correct the
condition, contact the retailer from
whom the watch was purchased.
The watch was dropped,
worn while playing active
sports, hit against hard
surfaces, or exposed to
strong vibrations.
Reset the time. If the watch does not
return to its normal accuracy after
resetting the time, contact the retailer
from whom the watch was purchased.
The date changes during
daytime.
A.m./P.m. is not correctly
set.
When you set the time, note that the
moment the date changes is midnight.
When setting the hour hand, be sure
that A.m./P.m. is correctly set.
Even though you wear the
watch every day, the power
reserve indicator does not
move up.
The watch is worn on your
wrist only for a short period of
time, or the amount of arm
movement is small.
Wear the watch for an extended period
of time. Or turn the crown to wind the
mainspring.
Right after starting the
watch, it seems that the
seconds hand moves more
quickly than usual when
setting the time.
When the watch starts
moving, it takes a little time
before the speed-regulating
unit starts operating. (This is
not a malfunction.)
It takes several seconds before the
speed-regulating unit starts operating.
To set the time correctly, wait for
approximately 30 seconds after the
seconds hand starts to move, and set
the time.
Blur in the display persists.
Small amount of water has
got inside the watch due to
deterioration of the gasket,
etc.
Consult the retailer from whom the
watch was purchased.
* For the solution of troubles other than above, contact the retailer from whom the watch was
purchased.
