Troubleshooting
Troubles Possible causes Solutions
The watch stops
operating.
The mainspring has not been wound.
Wind up the watch as per “How to wind the
mainspring” → (P.16), and set the time. If the
watch still does not operate, consult the
retailer from whom the watch was purchased.
The watch temporarily
gains/loses 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 5°C and 35°C.
The watch has been left close to an object
with a strong magnetic field.
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.
You drop the watch, hit it against a hard
surface, or wear it while playing active sports.
The watch is exposed to strong vibrations.
If accuracy does not return after setting the
time, consult the retailer from whom the watch
was purchased.
The watch has not been overhauled for more
than 3 years.
Consult the retailer from whom the watch was
purchased.
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Troubles Possible causes Solutions
The date changes at
12 o’clock noon.
AM/PM is not properly set. Advance the hands by 12 hours.
Blur in the display
persists.
A 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 a solution to a problem other than listed above, contact the retailer from whom the watch was purchased.
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Specifications
Cal. 4R35 4R36 4R37
4R38 / 4R71 /
4R72
4R39
1. Features 3 hands (hour,
minute,
second), date
display
3 hands (hour,
minute,
second),
date/day of the
week display
3 hands (hour,
minute,
second), 24-
hour hand,
date display
3 hands (hour,
minute,
second)
3 hands (hour,
minute,
second), 24-
hour hand
2. Vibrations per hour 21,600 vibrations/hour (6 vibrations/sec)
3. Operational
temperature range
Between −10°C and +60°C (14°F and 140°F)
4. Driving system Automatic winding type with manual winding mechanism
5. Duration Approx. 41 hours
6. Jewels 23 jewels 24 jewels
* The accuracy above is factory-adjusted.
* Due to the characteristics of mechanical watches, any actual daily rate may not fall within the range of time accuracy
specified above dependent on the conditions of use, such as the length of time during which the watch is worn on
the wrist, temperature, arm movement, and whether the mainspring is wound up fully or not, etc.
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