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Casio M-14 / M-15 Manual — Module 677
One owner's manual PDF for the Casio module 677 in English. Casio fitted it in the M-14 and M-15. Casio's spec sheet lists one CR2016, with 5 years of battery life and accuracy within ±30 seconds a month; the module first shipped in Nov 1987.
Module specs
Battery: CR2016 (lithium)
Rated battery life: 5 years
Rated accuracy: ±30 sec/month
Casio service manual ref: S/M-262
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Watch models using this module
| Model | Released |
|---|---|
| M-14- AKA [Melody Alarm] | 1986 |
| M-15- AKA [Melody] | 1986 |