This is a Tenshodo quartz watch. It's a ladies' watch. The chain is included as a bonus. It's a genuine, authentic product purchased from a major secondhand goods store, and its authenticity has been verified. Overall, there is no noticeable damage, and it's in relatively good condition. It is currently running without any problems. (The battery has been replaced.) 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. Please let me know. The size is approximately 24mm in diameter. Please consider this opportunity!