2 Mechanical watch movement The movement of a mechanical watch is basically comprised of three main parts: 1) The mainspring for power 2) The gears that transmit the power and move the hands 3) The balance wheel that oscillates back and forth, maintaining precision An analog quartz watch is the same as a mechanical watch as it has gears to transmit power, but it is powered by a battery and uses a quartz crystal as the oscillator to maintain precision. The main difference in a digital watch is that it uses an electronic circuit instead of gears. Oscillator Power source Watch accuracy SR621SW MADE IN JAPAN SR621SW MADE IN JAPAN Movement Display Mechanical watch Within approximately 30 seconds per day Within approximately 0.5 seconds per day Within approximately 0.5 seconds per day Analog quartz watch Digital quartz watch Transmitter Gears Balance wheel Mainspring Gears Quartz crystal oscillator Battery Electronic circuit Quartz crystal oscillator Battery
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