SEIKO Spring Drive Spacewalk development: the mission

We developed a watch that is both durable and usable during a spacewalk. The watch therefore must be safe, accurate, air-tight, light, large, easy to read and easy to use. In short it had to be a watch with perfect functionality in the extreme conditions of space.

For more on these criteria, see below:

Safe and Accurate:Tri-synchro Regulator

Air-tight:Special gaskets

Light:High-intensity titanimu

Light and Large

Easy to Read:Dial layout and Lumibrite

Easy to Use:oversized pushers and crown