While newer clocks may be easy to replace or repair due to the availability of parts, older or antique clocks are often collector's items that hold special sentimental, historic or financial value. Generally, antique clocks have more complicated movements that should only be handled by a professional.
In the days when wood and coal were common heating fuels, clocks needed to be serviced about every three years because smog and smoke caused the clock's oil to thicken more quickly, eventually causing the clock to stop. Today, regular service is often unnecessary, thanks to synthetic oils and cleaner air. Most antique clocks can run for years with only routine, do-it-yourself maintenance, such as rewinding.
However, antique clocks should be taken to a professional clock service provider every 10 years. Many clock owners only take their antique pieces for repair when the clock has stopped working. The repairs necessary to make the clock tick again are often costly and complicated. Instead of waiting for your antique clock to stop, take it to a repair person once every decade to prolong its life.