The result of replacing the O-ring in the watch by the master of the center, 2 minutes in the pool and such a result. They returned the money for the work, said that it was not their fault and the water got through the button, which is recessed, although it is always recessed, such a design. At the Casio service center, I was told that this was due to incorrect selection of the O-ring and repair only by replacing the entire mechanism.