San Martin: The dial or case back of a watch will indicate whether it is water-resistant. If the watch is labeled as water-resistant and no specific depth is specified, it satisfies general water-resistant requirements. Water resistance is not a permanent feature, though. Regular inspections are necessary because the gaskets surrounding the case back, crystal, and crown can deteriorate over time. This examination is frequently limited to a visual check for a general water-resistant watch. Usually done when replacing a battery, silicone lubrication can help the gaskets last longer – SAN MARTIN WATCHES