Casio made its first calculator in 1957, but Casio watches - prolific maker of sale watches didn’t enter the watchmaking business until 1974 with the release of the Casiotron. The Casiotron was revolutionary in its functionality, as it was able to display dates with automatic consideration of short months and leap years. This was to be the beginning of Casio’s dominance in the digital watches arena. Casio has a large selection of designs with some reaching iconic status like the G Shock and the Edifice lines of watches. In terms of sheer functionality, it is impossible to beat Casio whose unswerving desire to produce excellence is never compromised. Casio watches come with a one year limited warranty.