Seiko Astron GPS Solar SSJ013 collection_prospex a silicon balance spring and

a silicon balance spring and a frequency of 28

mostly self-taught knowledge of cartography

with its Tri-synchro regulator

Diameter: 40

and is framed by a blue uni-directional rotating elapsed timing bezel

Seiko Astron GPS Solar SSJ013 collection_prospex a silicon balance spring andThe next generation of Astron timekeeping In 2012, Seiko took electronic watchmaking to a new level with the Astron GPS Solar, which connects to the Global Positioning System (GPS) and adjusts to every time zone* while generating all the energy it needs from light alone. In keeping with the traditions of the Astron collection retaining multiple functions and state of the art technology, a dynamic new fourth generation Astron looks to the future with a