In general quartz watches seem to have a lifetime of 20-30 years. Mechanical watches without factory defects should easily run 10 years without maintenance, bu

In general quartz watches seem to have a lifetime of 20-30 years. Mechanical watches without factory defects should easily run 10 years without maintenance, but it's advisable to have them serviced every few years. But yes, even with their longevity, it's a given that replacing a cheap quartz every few years would probably still be cheaper than a mechanical watch.