Owner manual / German
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Casio Module 339 Manual
One owner's manual PDF for the Casio module 339 (German only). Casio's spec sheet lists one 364, with 2 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Sep 1985.
Module specs
Battery: 364 (silver-oxide)
Rated battery life: 2 years
Rated accuracy: ±20 sec/month
Casio service manual ref: S/M-175
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