What is the lifespan of a kinetic watch? | Ask Times Ticking 

My Seiko Sportura Auto Relay is 20 years old, and not even a battery change. Works like a charm.

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It is no different from a battery-powered watch. Capacitor replacement is required every 6 years (I have a Seiko Kinetic) and this replacement process is very very expensive. Get either an automatic or quartz watch, that's all... Mechanical or automatic watches can work for more than 20 years even without any maintenance. Then, after a short maintenance, another 20+ years... Before taking a watch for maintenance, check to see if it keeps good time. If it keeps good time, I don't take it for maintenance. After all, the money spent on maintenance is the same regardless of the condition of the watch...