Seiko Watch Since ancient occasions, Japanese individuals have admired the subtle gradations between light and shadow in nature. With that inspiration, Grand Seiko uses a easy case design composed of a flat aircraft and curved line that reply to the movement of sunshine. Grand Seiko creates this hard-edged, flat-surfaced case by way of a course of known as Zaratsu, giving the case a mirror-like smoothness where light and shadow play. There’s a reason why Seiko watches for men and women could be seen anywhere. Pioneers in Tokyo, Osaka, and Nagoya were studying and producing pocket watches based on Western merchandise. Japanese wholesalers wanted to purchase all of the imported timepieces from foreign trading corporations established in Yokohama, Kobe, and different open port areas. High precision automated calibers are optimized and adapted to be used in a diver's watch developed and manufactured completely by Seiko's main craftsmen. Since launching Japan’s first diver’s watch in 1965, Seiko’s progressive know-how has changed the worldwide requirements for diver’s watches for decades. The horological masterpieces found in the Credor sequence are true examples of haute horologerie.