Official Casio Sites:
Gshock.com – Official G-Shock USA site
Baby-g.com – Official Baby-G USA 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:
Select Country or Region for Support
G-Shock Replacement Parts:
PacParts (USA)
American Perfit (USA)
Tiktox (UK)