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Casio GR-15 Manual — Module 921
One owner's manual PDF for the Casio module 921 in English. Casio fitted it in the GR-15. Casio's spec sheet lists one CR2016, with 3 years of battery life and accuracy within ±30 seconds a month; the module first shipped in Sep 1990.
Module specs
Battery: CR2016 (lithium)
Rated battery life: 3 years
Rated accuracy: ±30 sec/month
Casio service manual ref: S/M-334
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Watch models using this module
| Model | Released |
|---|---|
| GR-15- AKA [CHAMPION RACER] | 1985 |