Casio GT-004 / GT-008 Manual — Module 1632

Four owner's manual PDFs for the Casio module 1632, each a different scan (English included). Casio fitted it in the GT-004 and GT-008. Casio's spec sheet lists one CR2016, with 18 months of battery life and accuracy within ±15 seconds a month; the module first shipped in Aug 1998.