Casio G-2500 / G-2500FL Manual — Module 2266

One owner's manual PDF for the Casio module 2266 in English. Casio fitted it in 5 models, including the G-2500 and G-2500FL — the full list is below. Casio's spec sheet lists one CR1616, with 2 years of battery life and accuracy within ±15 seconds a month; the module first shipped in Feb 2001.