Casio DW-5000C-1A / DW-5000C-1B Manual — Module 240

One owner's manual PDF for the Casio module 240 in English. Casio fitted it in 5 models, including the DW-5000C-1A and DW-5000C-1B — the full list is below. Casio's spec sheet lists one BR2320, with 7 years of battery life and accuracy within ±15 seconds a month; the module first shipped in Apr 1983.