Casio 53w calculator watch the casio 53w calculator watch has a classic retro design that will add a touch of an old school feel to any everyday outfit crafted with a digital read out display to the top coupled in a seamless fashion with an 8 digit calculator that offers addition subtraction multiplication and division capabilities this casio watch also features an alarm function along with an auto calendar that is pre programmed until 2079 completed with the casio branding watch