Blogs give Casio anniversary a boost Casio invites 100 bloggers to celebrate the 25th anniversary of its G-Shock watch. By Ragan StaffSept. 18, 2008 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.