Hi, Modern temperature compensated quartz movements are typically specified at +_ 10 seconds per year. An example is the Breitling Professional Aerospace I wear daily. Not excessively expensive (£1500) and not so obvious to muggers etc as a Rolex. The best current spec is "The Citizen" with an A660 movement at +- 5s/year but that's if you wear it at least 12h a day. See http://forums.timezone.com/index.php?goto=1910741&rid=0&t=tree for some more info.
Robert. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Neon John Sent: 17 April 2007 07:59 To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Most accurate clock on your wrist 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 <[EMAIL PROTECTED]> 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 >> >> _______________________________________________ >> time-nuts mailing list >> [email protected] >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >_______________________________________________ >time-nuts mailing list >[email protected] >https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts --- 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 _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts -------------------------------------------------------- Genetix Limited - Queensway, New Milton, Hampshire, BH25 5NN Registered in England No. 2660050 www.genetix.com Any opinions expressed in this email are those of the individual and not necessarily Genetix Ltd (Genetix) or any company associated with it. This email and any files transmitted with it are confidential and solely for the use of the intended recipient. If you are not the intended recipient or the person responsible for delivering to the intended recipient, be advised that you have received this email in error and that any use is strictly prohibited. If you have received this email in error please notify Genetix by telephone on +44 (0)1425 624600. The unauthorised use, disclosure, copying or alteration of this message is strictly forbidden. This mail and any attachments have been scanned for viruses prior to leaving Genetix network. Genetix will not be liable for direct, special, indirect or consequential damages as a result of any virus being passed on, or arising from alteration of the contents of this message by a third party. -------------------------------------------------------- _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
