SEIKO SEIKO commercialised Japan's first wristwatch and the world's first quartz watch, and its achievements are well-known and it often participates as an official sponsor and official timer at world championships such as the Olympic Games, etc. It is a watch brand that is fascinated by its Japanese technology and is patronised by celebrities overseas as well as Japanese celebrities. SEIKO is a watch manufacturer with a higher reputation overseas than in Japan, and releases various models around the world that are not officially on sale in Japan. SEIKO is loved by many watch fans because it surpasses other domestic brands in terms of the degree of perfection of design and the finish of the exterior, such as the case and bracelet, although the reliability of the movement is high. Styles Face style Plain Case shape Circular Pattern Plain Band colour Black Dial colour Blue Functions and specifications Clasp Tongue buckle Type of clasp Buckle Movement Automatic Display type Analogue Power source Automatic winding Materials and care Case material Stainless steel Windscreen material Mineral crystal Band material Silicone Size Case thickness 13 millimetres Band width 22 millimetres Case diameter 42 mm