Casio GS-300 / GS-300BL Manual — Module 2301

Two owner's manual PDFs for the Casio module 2301, each a different scan (English included). Casio fitted it in 6 models, including the GS-300 and GS-300BL — the full list is below. Casio's spec sheet lists one SR920W and a SR621W (for EL) backup cell, with 2 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Sep 1999.