Casio Men's EDIFICE 50th Anniversary Watch EFS-S640ZE-1AJRProduct Highlights The theme is "The Spirit of Creating Something from Nothing": The first wristwatch by Casio, "CASIOTRON," born in 1974, was the world's first digital watch to feature an auto calendar function. Since then, Casio has continuously challenged itself to innovate and create, introducing innovations such as solar charging systems, radio wave reception functions, and smartphone linking. The spirit of creating something from nothing has