Casio G-1500 / G-1500B Manual — Module 5105

One owner's manual PDF for the Casio module 5105 in English. Casio fitted it in 5 models, including the G-1500 and G-1500B — the full list is below. Casio's spec sheet lists one CTL920, with 6 months of battery life and accuracy within ±15 seconds a month; the module first shipped in Jun 2009.