Casio PAS-201 / PRS-200 Manual — Module 2531

One owner's manual PDF for the Casio module 2531 in English. Casio fitted it in 4 models, including the PAS-201 and PRS-200 — the full list is below. Casio's spec sheet lists one CTL1616, with 9 months of battery life and accuracy within ±15 seconds a month; the module first shipped in Aug 2002.