Casio MRG-1200T / MRG-1200TB Manual — Module 1798

Two owner's manual PDFs for the Casio module 1798, each a different scan (English included). Casio fitted it in the MRG-1200T and MRG-1200TB. Casio's spec sheet lists one SR920W and a SR621W backup cell, with 2 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Jul 1999.