Your clock’s movement is a mechanical device which requires a service schedule to keep it running. You may relate its workings to your car’s engine. As with your car’s engine, your clock’s parts are metal on metal. The main determining factor in how many years the parts last is how well you keep the oil that is lubricating the movement. As time goes by oil starts to break down and dry out. By running a clock movement that isn’t sufficiently lubricated you are cutting short the life of the movement. We recommend an oiling every 3-5 years for all mechanical clocks. With the proper service a well made clock movement should last many lifetimes passing down from generation to generation. We are in the 2nd generation of this trade. Over these 50+ years, thousands of clocks have passed through our repair bench, some are brought in critical condition. Most, if not all, are repaired and restored to the full satisfaction of the owners.