G-Shock GPW1000-1A Gravity Master Seiko Ananta Silicon Balance Spring Yes

Silicon Balance Spring Yes

Highly polished finish bezel

blue uni-directional rotating elapsed timing bezel

Additional features include an aluminum ring on the bezel

This lineup provides a choice of four colors

G-Shock GPW1000-1A Gravity Master Seiko Ananta Silicon Balance Spring YesG Shock GPW1000 1A Gravity Master GPS Atomic Solar Hybrid Men's Watch Introducing the GRAVITYMASTER, GPW1000 The Worlds First GPS ATOMIC SOLAR HYBRID with CASIO original GPS Hybrid radio controlled technology built inside a TRIPLE G Shock Resistant structure. This unique technology combines Multi band 6 capability to receive any one of six time calibration signals around the globe with a receiver that acquires position and time information from GPS