Casio Men's G-SHOCK 50th Anniversary Watch GMC-B2100ZE-1AJRProduct Highlights The theme is "The spirit of creating something from nothing": The first wristwatch from Casio, the "CASIOTRON," born in 1974, was the world's first digital watch to feature an auto calendar function. Since then, Casio has continuously challenged itself in pursuit of originality and innovation, introducing features such as solar charging systems, radio wave reception, and smartphone linking. The spirit of creating something from