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by creeble 1044 days ago
It's not totally uncommon. I have a Waveceptor and several other clocks that use WWVB.

One works perfectly, most of the others are usually good, one gets off a couple of times a year (so therefore useless), and my Waveceptor has gone nuts maybe a couple of times.

It seems to be all about signal strength (and a little bit about battery strength).

I see at least one of those watches has GPS reception.