I have a Citizen watch that's been in storage for at least 5 years. I needed to change the battery and had a devil of a time as I was unable to locate where to open the watch via the case back cover. In addition to obtaining the setting instructions (& other pertinent info), this site has an illustration that shows my watch has a lip @ 9. I found this to be helpful and wanted to pass it on.

Citizen Tech Support

Here's my prize! Sorry about the poor pic.

Thanks for the link Barbara. I used it already to track my venerable Digi-Ana that was presented to me by my father in the early 70's, it is becoming an antiquity!