Casio watches are worldwide recognized because of the status they carried along the years and affordable prices. Casio was established in April 1946 by Tadao Kashio, an engineer specializing in fabrication technology. Kashio's first major product was the yubiwa pipe, a finger ring that would hold a cigarette, allowing the wearer to smoke the cigarette down to its nub while also leaving the wearer's hands free. Japan was impoverished immediately following World War II so cigarettes were valuable, and the invention was a success.
There are all types of Casio watches available, not forgetting that Casio has also been there from the beginning of the time keeping to now the era of new time keeping and designs. The list of watches from the beginning to now is endless; The Casio F91W is an inexpensive quartz digital watch, it was introduced in 1991. The Casio DW-5600E is a model of digital watch; Casio introduced this model in 1996. It has 200m water resistance, one alarm, a countdown timer and a stopwatch. These features trigger an audible alarm. G-Shock is a brand of watches manufactured by Casio, known for its resistance to shocks (e.g. hard knocks and strong vibrations). The first G-Shock was the DW-5000C-1A designed by an engineer working for Casio named Kikuo Ibe. It was released in April 1983. For the next few years Casio released a handful of new models each year. The Frogman is a high-end model of the Casio G-Shock line of watches. It was one of the first models of the "Master of G" line, a line of G-Shocks designed for special uses.
Today, Casio is most commonly known for durable, large sized watches. Especially popular are its dual function (LCD and analog) watches, some of which, called Wave Ceptors, receive radio signals daily from an atomic clock to keep accurate time.