Casio EF-505 / EF-512 Manual — Module 2328

One owner's manual PDF for the Casio module 2328 in English. Casio fitted it in 5 models, including the EF-505 and EF-512 — 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 Jan 2000.