When was the First battery watch made?

The first battery powered watch was publicly announced on January 3rd, 1957 by Hamilton, an American watch. This watch however was a mechanical watch, which is different from the most common (and more accurate) type of battery powered watch that is used today which is called a 'quartz' watch. The first company to successfully develop, produce, and sell a quartz watch commercially was Seiko on December 25th, 1969.