Casio G-7800 / G-7800B Manual — Module 3163

One owner's manual PDF for the Casio module 3163 in English. Casio fitted it in 5 models, including the G-7800 and G-7800B — the full list is below. Casio's spec sheet lists one CR2025, with 5 years of battery life and accuracy within ±15 seconds a month; the module first shipped in Oct 2008.