Owner manual / German
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Casio Module 310 Manual
One owner's manual PDF for the Casio module 310 (German only). Casio's spec sheet lists one GR927, with 5 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Dec 1985.
Module specs
Battery: GR927 (silver-oxide)
Rated battery life: 5 years
Rated accuracy: ±20 sec/month
Casio service manual ref: S/M-181
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