Casio EF-316 / EF-333 Manual — Module 1794

Five owner's manual PDFs for the Casio module 1794, each a different scan (English included). Casio fitted it in 5 models, including the EF-316 and EF-333 — the full list is below. Casio's spec sheet lists one SR621SW, with 2 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Mar 1999.