Casio BGX-130BD / BGX-151 Manual — Module 1909

Three owner's manual PDFs for the Casio module 1909, each a different scan (English included). Casio fitted it in the BGX-130BD and BGX-151. Casio's spec sheet lists one CR1616, with 15 months of battery life and accuracy within ±15 seconds a month; the module first shipped in Oct 1998.