[time-nuts] Most accurate clock on your wrist

Neon John jgd at johngsbbq.com
Tue Apr 17 02:59:13 EDT 2007


Hey y'all,

Interesting site but he's kinda behind the times, so to speak :-)
about what modern, more pedestrian watches can do.

Back around Christmas I bought a Luminox dive chronometer, model
3HMBM.  This is the one with the chrono functions in the form of a
little LCD screen under 12 o'clock.  I got this one for two reasons.
First and foremost, it has tritium-illuminated hands and dial. Second,
it's waterproof which means it's also mostly "me-proof"....

The analog and digital sections are separate and get set separately,
strangely enough.  Even more strangely, the analog part keeps better
time.

When I got the watch I spent a bit of time getting it exactly synced
with the NTP-controlled system clock on my computer.  I observed it
for deviation daily for awhile but it became evident that this
frequency wasn't necessary.  This is an amazingly accurate watch.  I
just checked it and it's almost 4 second fast.  That works out to
about a second a month.

This is by far the most accurate watch I own, including my WWVB synced
watches.  I have two, a G-shock and a combo analog/digital chrono
similar to the Luminox.  Both drift worse than a second a day if they
don't receive a signal.

I don't know if there is anything out there any better than the
Luminox but I kinda doubt it.  A second a month is superb performance
for a wristwatch.

John

On Tue, 17 Apr 2007 01:20:12 +0200, Sebastian Stolp
<sebastianstolp at gmx.net> wrote:

>hi jim, here's the thing you were asking for:
>
>http://home.xnet.com/~cmaddox/omega_megaquartz_2400.html
>
>as for myself - i do rely on a seiko 7548 reference quartz watch with  
>a 'drift' of +/- 15 sec. per month.
>noz bad for a unit used for boiling eggs on a sunday morning ;-)
>
>best regards, sebastian
>
>
>
>Am 17.04.2007 um 01:11 schrieb Palfreyman, Jim L:
>
>> Hi Folks,
>>
>> What is the most accurate wrist watch you can purchase? Obviously the
>> radio controlled ones are the best, but I'm curious as to the fully  
>> self
>> controlled units.
>>
>> Oh and yes I have seen the photo of the caesium clock attached to
>> someone's wrist!
>>
>> Also, on the NIST website they talk about a new development - the  
>> atomic
>> clock the size of a grain of rice. I see this as having huge future
>> potential. Does anyone have any news on this development?
>>
>> Oh and yes I want one!
>>
>>
>> Jim Palfreyman
>>
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---
John De Armond
See my website for my current email address
http://www.neon-john.com
Cleveland, Occupied TN
All great things are simple and many can be expressed in single words:
Freedom, Justice, Honor, Duty, Mercy, Hope.  -Churchill




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