Owner manual / English
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Casio Modules 112 / 123 Manuals
One owner's manual PDF for the Casio modules 112 and 123 in English. For module 112, Casio's spec sheet lists one 399, with 18 months of battery life and accuracy within ±15 seconds a month; the module first shipped in Jan 1982.
Module specs
Battery: 399 (silver-oxide)
Rated battery life: 18 months
Rated accuracy: ±15 sec/month
Casio service manual ref: S/M-125
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