Owner manual / English
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Casio Module 311 Manual
One owner's manual PDF for the Casio module 311 in English. Casio's spec sheet lists one 371, with 3 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Aug 1984.
Module specs
Battery: 371 (silver-oxide)
Rated battery life: 3 years
Rated accuracy: ±20 sec/month
Casio service manual ref: S/M-161
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