Casio ABX-620 Manual — Modules 1353 / 1361

Two owner's manual PDFs for the Casio module 1353, each a different scan (English included). Casio fitted it in the ABX-620. The same documents also cover module 1361. For module 1353, Casio's spec sheet lists one SR927W, with 2 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Jul 1995.