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    Re: Chronometers after radio time signals
    From: Robert Eno
    Date: 2007 Oct 23, 14:12 -0400

    I echo Dan's sentiments. Please give us a model number and if possible, I'd like to see a photo of this watch.

    I bought a Seiko Sports 150 quartz watch in 1989 for $250.00 Cdn. It is indestructable and has served me well over the years. It gains about 0.5 seconds per day and has dual time zones. Still, it won't last forever and when the time comes to replace it, the one you described sounds alluring.

    Robert 

     

    ----- Original Message -----

    From: Dan Allen <danallen46{at}airwired.net>

    Date: Tuesday, October 23, 2007 1:16 pm

    Subject: [NavList 3521] Re: Chronometers after radio time signals


    > On 23 Oct 2007, at 10:47 AM, Gary LaPook wrote:

    > > I bought a Torgoen dual time zone watch for about $175.00 on  
    > > October 12, 2004, three years ago, and, so far, it has gained 
    > only  
    > > 14 seconds, and the rate has been very consistent.

    > That is almost too good to be true!

    > Do you have a model number for this watch?  Do you know if it is a 

    > twin-quartz, or an oversampled quartz movement?  Typical quartz  
    > watches run 15 seconds a month, and there are only a very, very 
    > few  
    > that have these additional technologies which generally improve  
    > accuracy to around 15 seconds a year.

    > I have, for example, a certain Seiko SLL033 with the oversampled  
    > 176KHz movement good to around 20 seconds a year.  I also have an  
    > Omega 1552.30 good to around 15 seconds.  These are hard watches 
    > to  
    > find, and in addition, they often change movements year to year so 

    > you have to really check things out to ensure that you can find a  
    > truly accurate watch.

    > I have a Citizen solar powered WR 200 Perpetual Calendar which 
    > makes  
    > no claims for high accuracy and yet it has given almost the same  
    > accuracy.  Quartz watches are affected by temperatures and 
    > sometimes  
    > if you have a watch at a constant temperature the randomness 
    > cancels  
    > and you get high accuracy, but it is not guaranteed across 
    > different  
    > examples of the same watch.

    > Dan



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