The watch stops operating.
The mainspring has not been wound.
Wind up the watch as per How to wind the mainspring, and set the time. If the watch still does not operate, consult the retailer from whom the watch was purchased.
The watch 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.
Accuracy cannot be recovered. Restoring the original accuracy requires demagnetization (repair). Consult 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.
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.