I sell in Wan Ye watch company From the theory that waterproof 100 meters can swim, but the waterproof performance will be due to the use of environmental changes, such as the watch before the sale is placed in the counter, the counter lighting and temperature, as well as the placement of time will be on the waterproof ring and waterproof oil, the waterproof performance of the watch will have an impact. So the watch should be tested for waterproof performance every 1-2 years. Even if it is a professional diving watch, waterproof test should be carried out before going into the water.
If you buy the watch is not long, the watch is better kept, swimming is not a problem.