Seiko 5 Sports – GMT - Ref SSK017– Cal 4R34

Seiko 5 Sports GMT with reference SSK017K with round yellow dial and white dot and batons marking each hour. There is an inner 24-hour ring. At 6 o’clock is engraved “Automatic GMT” and “Made in Japan – 4R3400A2 R3”. The hands are white with Arrow style and the GMT hand is red. The watch comes with a black bezel insert. The crown is at 4 o’clock. It is a stainless-steel case with an exhibition sapphire case back and engraved around “Water Resistant 10 Bar – Stainless Steel – 4R3400A0 – A0 – Made in Japan - 789390”. The watch comes with an automatic Seiko movement with caliber 4R34 and 24 jewels. The watch has a jubilee bracelet with Seiko double folding clasp. The length of the bracelet is 7.5 inches.

History

It took only 40 years for the Kintaro Hattori firm, which was established in Tokyo in 1881, to become what it is known as throughout the world today as Seiko. 1892 saw the opening of the Seikosha plant, and in 1917 K. Hattori & Co. Ltd became a joint stock market. In 1924 it was given its internationally known name. From then on, progress was steady as the company developed in stages into the world’s number one clock producer with 350 million movements a year roll off the Seiko Epson production lines. As early as the 1930’s the company was displaying its wares in Tokyo’s fashionable Ginza shopping district. In 1964, Seiko was the official timekeeper of the Tokyo Olympics. In 1971, it introduces on of the world’s first automatic chronograph along with an early quartz wristwatch. From then on, electronics dominated time-measurement at Seiko. In 1981, Seiko tool over Jean Lasalle SA, a Geneva luxury brand that had gone bankrupt.

Technical details

Automatic Seiko movement with caliber 4R34 with 24 jewels, 21,600 A/h and 41 hours of power reserve.

Measurements

Diameter excluding winding crown: 42.50mm


Length including lugs: 46mm