The Seiko brand has been synonymous with precision watch engineering for over a century, with a series of firsts including the first production quartz watch. Seiko with caliber number 7N42 quartz movement have a range of accurate, stylish watches for every occasion, maintaining the original reputation for excellence and reliability for men and women. In fact, the accuracy of Seiko has led to the brand being the official timekeepers for various professional sports events. The quartz watch, delivering higher performance and greater durability. It is the quartz watch that merits the name Seiko. A quartz movement depends on a battery as a power source. The battery sends electricity to a quartz oscillator, which vibrates at precisely 32,768 times per second.