San Martin: The dial or case back of a watch will indicate whether it is water-resistant or not. The watch satisfies general water-resistant standards if it is labeled as such and no specific depth is specified. Water resistance, however, is a temporary characteristic. It’s important to periodically check the gaskets surrounding the case back, crystal, and crown because they can deteriorate over time. This inspection is typically a simple visual check for a general water-resistant watch. When replacing a battery, silicone lubricant is usually applied to help extend the life of the gaskets – SAN MARTIN WATCHES