An old weekend project from back in college: One day of research/sketching and one of modeling/rendering in SolidWorks + Keyshot 5. (2015).
The E Series is designed to fill a gap in the market between cheap (practical) digital watches and expensive (featureless) dress watches. The watch maintains all of Casio's core functions: day/date, stopwatch, countdown timer, alarm and light, but offers them in a sleek luxury package.
The result is the the Casio E series concept, a digital dress watch somewhere in between the Casio B640W and the Rado R21925152.
Details of the side button and watch back.
[author's note: It's interesting to look back and see how dramatically rendering technology has improved since 2015. These were state of the art at the time, but now appear flat and cartoonish. I have no doubt that the same will be true of my current work in a few years!]