[time-nuts] My Casio G-Shock watch and other fun stuff

Tom Van Baak tvb at LeapSecond.com
Thu Jun 21 09:35:21 EDT 2007

> Now, I cannot actually say that the Casios or any other brands actually
> discipline their oscillator. I know that the cheap WWVB-locked wall clocks
> are not disciplined - if they're running fast 2 seconds a day, then every
> night they just jump back two seconds.

Correct. I have heard one or two brands of RC clock use a
disciplining model but most behave just as you describe.

Example: for plots of a Junghans RC wristwatch gaining
160 ms per day, every day, see:



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