Any finely crafted watches requires regular maintenance once in the period of three-five years to guarantee its perfect performance. An authorized service center will offer the watch proper maintenance that comprises complete disassembly, cleaning, re-assembly, and lubrication of the movement. The watch owners who try to open their watch themselves may accidentally expose the watchcase to dust and moisture. This way they may also cause damage to the gaskets, the movement, or the watchcase. That is why it is strongly advisable to send the timepiece requiring repair or adjustment to an authorized service center.