Casio watch. Had it for ~20yrs. It died today but I just replaced the battery and it's back again! I had only changed batteries twice: 10 yrs ago and today. Truly BIFL
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casio illuminator,10year battery WR100M, light chronograph works fantastic,47mm | eBay
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Casio Illuminator found while snorkelling for dropped items under Capilano Suspension Bridge in North Vancouver. No idea how long it was down there and it was running when I found it. Had
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