Seiko Spacewalk

Spring Drive Spacewalk is specially designed and built to accompany the first private individual ( Richard Garriott ) to conduct a Spacewalk.
Richard Garriott, famous video game designer and adventurer, will become the 6th private space explorer and conduct his space mission aboard the International Space Station in October 2008. As Richard goes out into free space, he will be wearing a Seiko Spring Drive Spacewalk.

Seiko specialists did not consider quartz movements as battery-operated instruments that lack special treatment are not used for a Spacewalk for safety reasons. Thus, they had to choose between a mechanical movement and Spring Drive.

The mechanism to be incorporated by the Spacewalk must guarantee the maximum safety and accuracy, even when the watch is exposed to an extreme range of temperature from - 20°C to + 70°C.

The ability of the watch to provide accuracy at extreme temperatures is of the greatest importance, but no mechanical watch can maintain its accuracy in such conditions - the traditional escapement responsible for regulating the time in all mechanical watches is characterized by the inherent instability in the extreme conditions.

That is why Spring Drive has become the best solution the Seiko specialists could find.

The Spacewalk watch is equipped with the Spring Drive Chronograph Caliber 5R86. The mechanism provides the following functions: hours, minutes and seconds, calendar, GMT , 72-hour power reserve, and 12-hour chronograph.

Unique Characteristics of the Spacewalk:

1. Air-tight caseThe watch case needs to be completely air-tight to allow the timepiece operate in the vacuum of free space. Seiko based the creation of the Spacewalk watch on its rich experience in the field of divers watches able to resist pressures up to 1,000 meters. Spacewalk incorporates special features to guarantee air-tightness in the vacuum of free space. In particular, Seiko engineers developed a new type of gasket, having applied a rubberized material.
2. Light weight of the case Instruments to be used in space must be extremely light and strong. The case of the Seiko watch was crafted in high -intensity titanium, the material 40 percent lighter than stainless steel. The 100-meter waterproof construction weighs just 92.5 grams.
Seiko engineers had to make the case not only light but also as large as possible. To offer great readability, they designed the case to have minimum volume but maximum dial opening size. They built the case, 53.0 x 48.7 mm in diameter, 15.2 mm thick, with recessed sides, having come up with a new engineering solution, using a Seiko-in-house CNC (computer numerical control) machine. The innovative process allowed to reduce the volume of the case material by 30 percent. Altogether, the Spacewalk watch has the case characterized by the optimum balance of strength, lightness and wide dial opening.
3. Great readability of the dialThe Seiko Spring Drive Spacewalk watch features a new layout, with the chronograph dials placed at the top. The timepiece has the specifically designed hands and hour markers covered by the additional layers of Seiko's Lumibrite material. The dial has become at least three times brighter than a traditional luminous watch.
4. Extreme comfort of useThe Seiko watch has been designed with over-sized buttons that can be easily pressed even when wearing thick space gloves. The buttons are placed at the top of the case for easier access.
Seiko will produce the Spring Drive Spacewalk watch in a limited number of only 100 pieces. Richard Garriott will take 3 pieces to accompany him on his mission, while the rest of the space-proof watches will be distributed worldwide in December 2008. Estimated Price: US$26000

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