Casio LWV-100J Manual — Modules 2581 / 2671

Two owner's manual PDFs for the Casio module 2581, each a different scan (English included). Casio fitted it in the LWV-100J. The same documents also cover module 2671. For module 2581, Casio's spec sheet lists one CR1616, with 2 months of battery life and accuracy within ±15 seconds a month; the module first shipped in May 2003.