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    Re: Chronograph
    From: David Iwancio
    Date: 2020 Mar 4, 19:46 -0800

    db:

    I don't know about other manufacturers, but the Casio radio-controlled watches I have experience with allow you to disable automatic synchronization, as an option within time-setting mode (where you'd at least set time zone and daylight-saving time).  Manual synchronizaiton is started by holding down a "RECEIVE" button, while simply depressing it would display the time of the last successful synchronization (automatic or manual). 

    Of course I needed to know that because, left on its own, my current radio-controlled G-Shock gains about 0.7 s/day, so I end up with possible rounding errors after about 18 hours.  I believe I can open the case and adjust its rate, but I'm squeamish about breaking the watertight seal if I don't "need" to.

    On the flip side, a bare-bones waterproof Casio I bought new for 25 USD only gains about 0.1s/day.  I feel like I bought a winning lottery ticket with that one.

       
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