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  1. Casio G-Shock
    Hey everyone, I calibrated as best I could all 4 watches that I had at that time to the nist.gov internet time on my PC on the 1st of January. Today, 28 days later, here are my not-very-scientific findings: Casio PRG510T - 5 secs fast Casio SGW-400 - 4 to 4.5...
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