Citizen Eco Drive Gn-4w-s-12g Manual Link

Use a jeweler’s loupe. Look for a smaller, fainter engraving reading “Cal. XXXX” where XXXX is a digit-letter combo (e.g., Cal. 8651, Cal. E168). Citizen often places the caliber near the bottom edge of the case back.

(e.g., "E111" or "H500"). It is typically positioned near the outer edge of the metal plate.

If you are in an area without radio signal coverage, you can set the time manually. citizen eco drive gn-4w-s-12g manual

Citizen does not use "GN-4W-S" as the primary identifier for manuals, as that code typically refers to the or water resistance. To get the exact setting instructions, follow these steps:

This is a Citizen internal manufacturing code. It specifies the structural design of the watch case, water resistance sealing types, and the specific tools required by technicians to open the case back. Use a jeweler’s loupe

| Feature | 📡 E670 Caliber Variant | 🌐 H45 Caliber Variant | | :--- | :--- | :--- | | | Eco-Drive Solar, Radio-Controlled (5 Channels) | Eco-Drive Solar, Radio-Controlled | | Case Material | Stainless Steel | Stainless Steel | | Case Size | Approx. 44-45mm | 42mm (varies) | | Crystal | Sapphire | Sapphire | | Water Resistance | 200m / 20 bar | 100m / 10 bar | | Functions | Chronograph (1/20s), World Time (24 cities), Alarm, Radio Sync | World Time, Date, Radio Reception Indicator, DST Setting | | Strap | Black perforated leather / Titanium bracelet | Black leather strap |

Rotate the crown forward until the hands pass midnight and the date clicks over to the current day. 8651, Cal

A solar cell under the dial converts any light into electrical energy.