Casio EF-319D / EF-321L Manual — Module 4775

One owner's manual PDF for the Casio module 4775 in English. Casio fitted it in 4 models, including the EF-319D and EF-321L — the full list is below. Casio's spec sheet lists one SR920SW, with 3 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Nov 2006.