Commemorative official watch from the 7th International Dolphin and Whale Conference. It was a premium item at the time, purchased for around 40,000 yen. I used it briefly once and then kept it in storage, as I didn't want to wear it. There are no stains, but there is some yellowing due to the passage of time. Since it's a combination of yellow and clear, the color blends in and I don't think it's too noticeable. I disposed of the case and stored the watch with the instruction manual in a clear bag. The battery is dead.