Casio Collection Calculator Quartz Digital Dial Black Resin Strap Unisex Watch CA-53W-1ER The Case: As featured in the Sci-Fi classic, ‘Back To The Future’, the case of this retro Casio Collection Calculator CA-53W-1ER classic model measures at 34mm in diameter. It is made from resin, which makes the watch less susceptible to shocks. Its rectangular dimensions allow for the calculator to be put to use easily. Acrylic glass sits on top of the case. On the flip side there is a screw down case back. The Dial: This digital, 8-digit calculator dial is instantly recognisable. The top half of the dial displays the digital time, while the bottom half of the dial is occupied by the calculator buttons. The Casio logo sits at the top of the case. The Bracelet: The simplistic black bracelet is made from synthetic resin, it is the ideal material for wrist straps thanks to its extremely durable and flexible properties. It fastens easily using a standard buckle. The Functions: This timepiece is powered by a quartz battery that offers a 5-year battery life and +/- 15 seconds accuracy a month. It also features a dual display function, as well as a calculator function. A preprogrammed calendar set until 2099 and a stop watch with 1/100 second accuracy both feature. It is water resistant up to 50 metres, making it suitable for surface swimming. If you have any questions please  click here Click here to join our  facebook  and  Instagram !