Casio OC-100 / OC-101 Manual — Module 2717

Three owner's manual PDFs for the Casio module 2717, each a different scan (English included). Casio fitted it in the OC-100 and OC-101. Casio's spec sheet lists one SR621SW, with 3 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Mar 2002.