Casio HDA-600 / MW-600 Manual — Module 1311

Three owner's manual PDFs for the Casio module 1311, each a different scan (English included). Casio fitted it in the HDA-600 and MW-600. Casio's spec sheet lists one CR2016, with 10 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Jan 1995.