The history of watches began in 16th century Europe, where watches evolved from portable spring-driven clocks, which first appeared in the 15th century. The watch which developed from the 16th century to the mid 20th century was a mechanical device, powered by winding a mainspring which turned gears and then moved the hands, and kept time with a rotating balance wheel.
The invention of the quartz watch in the 1960's, which ran on electricity and kept time with a vibrating quartz crystal, proved a radical departure for the industry. During the 1980's quartz watches took over the market from mechanical watches, an event referred to as the "quartz crisis". Although mechanical watches still sell at the high end of the market, the vast majority of watches now have quartz movements.
нефрит камень знак зодиака
камень знак зодиака рака
камень знака зодиака дев
девы камень знака зодиака
камень дерево знакам зодиака
https://newsaboutss.blogspot.com/2021/05/blog-post.html
https://bestnewsones.blogspot.com/2021/05/blog-post.html
https://ewerynews.blogspot.com/2021/05/blog-post.html
стрелец камень знак зодиака
камни знаков зодиака тельцов
зодиак знак камень
знак зодиака лев камни
знак зодиака весы камень
камень знака зодиака львов
знаки зодиака скорпион камень
камень яшма знак зодиака
аметист камень знаки зодиака
гематит камень знак зодиака
знаки зодиака свойства камней
знаки зодиака камень лев
какой камень знаку зодиака