Citizen Cosmo Sign men's wristwatch. This is a rare model where the constellation dial also rotates gradually over time. Regarding the condition, please refer to the images as it is subjective. I will answer any questions in the comments. In September of this year, a delay that couldn't be fixed by a battery replacement occurred, so I disassembled, cleaned, lubricated the gear train, and replaced the battery. Since then, it has been running with almost no errors, so I think you can use it with confidence for several years. Operation: Rotate the constellation dial by pulling the crown out one step, and set the time by pulling it out two steps. The wrist size is about 17cm. Although it has been serviced, it is a vintage quartz watch, so I hope you understand that it is being sold as is.