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Casio AQ-321 Manual — Module 309
One owner's manual PDF for the Casio module 309 (German only). Casio fitted it in the AQ-321. Casio's spec sheet lists one 392, with 2 years of battery life and accuracy within ±15 seconds a month; the module first shipped in Aug 1983.
Module specs
Battery: 392 (silver-oxide)
Rated battery life: 2 years
Rated accuracy: ±15 sec/month
Casio service manual ref: S/M-144
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Watch models using this module
| Model | Released |
|---|---|
| AQ-321 | 1983 |