I think it's the same model. I searched also and found that the first digit of the serial number should be the year of manufacture. But since it starts with 0, I can only assume it is either 1990 or 1980. Thank you very much for your help.
My friend needs help on identifying a ladies Citizen mechanical watch. It is believed that it's about 30 years old. There haven't been a lot of discussions in the forum on Citizen watches, but I'm sure there are masters and experts on one of the 2 major Japanese watch-making companies among us. Any