Citizen Promaster Eco-Drive Air Diver 200M Watch. Currently working without any problems. It is solar-powered. I have never replaced the battery since purchasing it. There are no extra links, so it can only be worn by those with thin wrists. (Additional Information) The battery is weak as I have not replaced it. The second hand moves erratically after charging, but it starts ticking every second when the time is set. Currently, it keeps accurate time after charging is complete. There are scratches and dirt. Please consider purchasing if you are not concerned about the above. Operation...Good