Casio CA-53W am/pm/24 hour Time, Date & Mute Settings Demonstration by Casio Watchers - YouTube
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Casio CA-53W - The Retro Calculator Watch for Pebble : r/pebble
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CA53WF-8B Databank | Casio USA
How to set the time and date on a Casio CA-53 (with video and review)
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Casio Databank CA-53W Calculator Watch | Reviews by WYCA
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