Casio OC-500 / OC-501D Manual — Module 2714

One owner's manual PDF for the Casio module 2714 in English. Casio fitted it in 4 models, including the OC-500 and OC-501D — the full list is below. 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 Mar 2002.