Common calibers for GN-4W series: Often (simple date), E690 (chronograph), or similar. Do not proceed until you locate this 4-digit code.

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To locate the official for a watch marked with the case code GN-4W-S (often searched as gn4ws12g), you must navigate to the Citizen Watch Setting Instructions Hub and locate your specific 4-character movement caliber number from the case back.

If your watch has chronograph push-buttons, for 2 to 3 seconds, then release. Push the crown back in completely to Position 0.

This is the “warning” hand movement. The watch is severely depleted. Charge immediately. Do not use chronograph until fully charged.

Push the crown back into the normal position (0) to ensure water resistance. 3. Maintenance and Care for the GN-4W-S-12G

Disclaimer: Product specifications and manual locations are subject to change by the manufacturer. Always refer to official Citizen documentation for warranty and safety instructions.

Your watch is 12 hours off. Advance the time by 12 hours (pull crown to position 2, rotate hands forward until the date changes at midnight, not midday).

Since this is a radio-controlled watch (often marketed as "Radio Controlled" or "Atomic Timekeeping"), it receives a signal from an atomic clock to set itself automatically. If you travel or the watch is not syncing:

Click here for Citizen’s manual lookup page. 2. Setting Your Citizen Eco-Drive (General Guidelines)

: The first four characters before the hyphen (e.g., E111 , H800 , U680 ) are what you need.

The GN-4W-S-12G allows you to switch time zones instantly.