Owner manual / German
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Casio Module 1042 Manual
One owner's manual PDF for the Casio module 1042 (German only). Casio's spec sheet lists one CR1616, with 3 years of battery life and accuracy within ±30 seconds a month; the module first shipped in Jun 1993.
Module specs
Battery: CR1616 (lithium)
Rated battery life: 3 years
Rated accuracy: ±30 sec/month
Casio service manual ref: S/M-411
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