Casio BGR-220 Manual — Modules 2170 / 2410

Two owner's manual PDFs for the Casio module 2170, each a different scan (English included). Casio fitted it in the BGR-220. The same documents also cover module 2410. For module 2170, Casio's spec sheet lists one CR1616, with 24 months of battery life and accuracy within ±15 seconds a month; the module first shipped in May 2000.