I bought this over 15 years ago at Komehyo in Osu, Nagoya. It cost around 35,000 yen at the time. I bought it without knowing what it was, as the salesperson recommended it. I recently had ChatGPT investigate it. There are almost no scratches or stains, and it charges via solar power and keeps accurate time, but the buttons are mostly non-functional, so I can't set the date, etc. Also, there are no instructions or case. Here's the explanation from ChatGPT: Recognizable features: Large "ROOX" logo in the center. Around it: RADIO WAVE CONTROL SOLAR → Indicates it's a radio wave solar-powered watch. The design of the back cover (grid pattern + gold circle) is a common feature of the Seiko ALBA ROOX series. Conclusion: This is a SEIKO ALBA ROOX series watch. In other words, your watch is: > A radio wave solar-powered watch from the "ROOX" series, a model of SEIKO's sub-brand "ALBA." Features of this series: Solar charging + radio wave reception function (automatic time correction) Models for the Japanese market, mainly sold in the mid-2000s to around 2010 Design is business-oriented (stainless steel, calm appearance) Uses reliable Seiko movements Not a high-end line, but a practical, mid-range model Thank you for viewing.