Casio Youth F-91WS-7 Quartz Women's Watch Short, stocky and strong, the well-rounded corners of the Casio are enough to detect precisionist work on high-grade, quality material. For the rest, you have to go through one by one with all the technological advancements put into it. This is where it differs from the ‘80s watch after which it was modelled. It’s your easy, go-to watch; reliable and resilient.