"Ignoramus30509" wrote in message
.. .
A week ago I posted a surprised message about a $6 watch from walmart
that seemed to be accurate.

The result is that the watch is not even by one second off!!!
Obviously, there are limits to my own precision in how I pressed the
return key right when the watch ticked :00, plus the OS delay in
starting "date", but in any case I could not detect any difference.

I find it rather amazing, really.

Quartz crystals gradually age, so it will be interesting to see how well it
keeps time in, say, a year's time.
( The warmth of your body and your built-in thermostat will effectively keep
the temperature variations under some control. )

--
M Stewart
Milton Keynes, UK
http://www.megalith.freeserve.co.uk/oddimage.htm

On Fri, 17 Mar 2006, at 23:12:16, Malcolm Stewart
wrote
Quartz crystals gradually age, so it will be interesting to see how
well it keeps time in, say, a year's time.

Interesting comment. I didn't know that age would affect their frequency
of vibration, or whatever. I have a Seiko SQ100, now 21 years old. Just
new batteries, never a service. It still keeps time to 0.5 secs per
month, as it did from new.

As an aside, although quartz watches usually have their accuracy stated
as +/- 15 secs per month, the worst I have is a cheapo Casio which gains
about 1.5 secs a month. All the rest are about 0.5.
--
Tony Stanford