Casio Digital Sports Watch (F91W-1): Turn Off Hourly Beep - shortmanual.com
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Casio W800H-1AV [1/3] Displayed an alarm setting and an hourly time signal setting is available in the alarm mode which you enter by pressing c page e 4
Casio Baby-G Digital Watch Women Clear 200M Alarm 3252 BG-169R New Battery | eBay
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