Casio G-7100 / G-7100D Manual — Module 2821

Two owner's manual PDFs for the Casio module 2821, each a different scan (English included). Casio fitted it in 4 models, including the G-7100 and G-7100D — the full list is below. Casio's spec sheet lists one CR2025, with 10 years of battery life and accuracy within ±15 seconds a month; the module first shipped in Dec 2003.