Casio EFA-123 / EFA-123D Manual — Module 4397

Two owner's manual PDFs for the Casio module 4397, each a different scan (English included). Casio fitted it in the EFA-123 and EFA-123D. Casio's spec sheet lists two SR726SW cells, with 2 years of battery life and accuracy within ±30 seconds a month; the module first shipped in Jun 2007.