In 1963, Seiko launched the first mechanical watch "Seiko No. 5", which was also the first self-winding watch produced in Japan. It caused a huge reaction when it was launched.
The "Seiko No. 5" belongs to the Seiko automatic movement line, its logo is a combination of a shield shape and the number 5 on the dial. The number 5 represents 5 very practical functions: anti-magnetic, shockproof, waterproof, self-winding and dual calendar display.