Owner manual / English
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Casio Modules 300 / 302 Manuals
One owner's manual PDF for the Casio modules 300 and 302 in English. For module 300, Casio's spec sheet lists one 391, with 15 months of battery life and accuracy within ±15 seconds a month; the module first shipped in Mar 1981.
Module specs
Battery: 391 (silver-oxide)
Rated battery life: 15 months
Rated accuracy: ±15 sec/month
Casio service manual ref: S/M-120
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