Official Casio Sites:
GShock.com – Official G-Shock USA site
Baby-G.com – Official Baby-G site
G-Shock.jp – Official G-Shock Japan site
G-Shock.eu – Official G-Shock Europe site
World G-Shock – Other official G-Shock sites
Official Pro Trek USA
ProTrek.com – Other official Pro Trek sites
Official Casio Support:
USA
UK
Australia
Brazil
Canada
Europe
India
Malaysia
Middle East & Africa
Singapore
South America
G-Shock Replacement Parts:
PacParts (USA)
American Perfit (USA)
Tiktox (UK)