Seiko Astron GPS Solar SAST015 Luminox SXC PC Carbon GMT A.5021.GN With its slim combination module

With its slim combination module and Carbon Core Guard structure

open titanium caseback

auto cumulative ascent and descent of particular treks)

a 39mm screw-back case

Seiko Astron GPS Solar SAST015 Luminox SXC PC Carbon GMT A.5021.GN With its slim combination moduleSeiko Astron GPS Solar SAST015 The Seiko Astron GPS Solar SAST015 is the first in the new Astron GPS series to feature a titanium case and bracelet, both utilizing ceramic for the bezel and center links of the bracelet. The SAST015 has a semi sport semi dress look, making for a great neutral every day wear. The SAST015 features the 7X52 caliber, which is in house manufactured by Seiko and has technological advancements also manufactured by Seiko. The