This is a collaboration watch between muta and Case Smith. It's a quartz watch for men. It's a genuine product, purchased from a major second-hand shop and authenticated. Overall, there is no noticeable damage, and it's in very clean condition. It is currently running without any problems. A storage box is included. It is a genuine product, so please rest assured. Although it's highly unlikely, if it turns out to be a fake, you can return it. The size is: diameter → approx. 37mm, length → approx. 57mm, wrist circumference → approx. 16cm - 20cm. Please consider this opportunity! ☆