On many occasions we can acquire an electronic watch which has not been checked and the seller does not tell us if it has a fault or not.
In today's video tutorial we will proceed with the basic checks and first operations that we must perform on a watch when we do not know its mechanical and electronic state. We will also see the correct way to change the battery when it is exhausted.
These simple operations can make most of the watches we buy on the second hand market work.