A mechanical watch needs regular service which is usually just cleaning, lubricating, replacing seals and springs. Eventually it will need replacement parts and that is probably the end of life for the watch.
There are a some brands that will service every watch they've ever made, fabricating new parts as needed. Few of us can afford one of those.
There are a some brands that will service every watch they've ever made, fabricating new parts as needed. Few of us can afford one of those.