: Look at the back of your watch case. You are looking for a string of characters (e.g., H060-T025919 or E870 ). The first four alphanumeric characters before the hyphen represent your movement caliber.
(often part of a larger stamp like GN-4W-S) is a common case-back marking that indicates the watch's water resistance and case type, rather than its specific movement model. To find the correct user manual, you must identify the also found on the case back. How to Find Your Specific Manual Citizen Gn-4-s User Manual
While specific steps vary by movement, most Citizen analog watches with this case marking follow these general procedures: Instruction manual | CITIZEN WATCH Global Network : Look at the back of your watch case