Casio EF-109D / LIN-168 Manual — Module 2719

Three owner's manual PDFs for the Casio module 2719, each a different scan (English included). Casio fitted it in 4 models, including the EF-109D and LIN-168 — the full list is below. Casio's spec sheet lists one CR2012, with 10 years of battery life and accuracy within ±20 seconds a month; the module first shipped in May 2002.