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    Accurate Watches
    From: Dan Allen
    Date: 2001 Oct 24, 8:08 PM

    If you want a reliable time piece, may I recommend two hard to find watches.
    
    First there is the Seiko SLL033 Perpetual Calendar.
    
    Its features include:
    
    1) Perpetual calendar automatically adjusts for odd and even months
    including leap years up to February 28, 2100.
    2) Calendar indicates date and can also indicate month.
    3) Second hand can indicate number of years since last leap year.
    4) Highly accurate with a yearly loss/gain rate of less than 20 seconds.
    5) Water-tested up to 50 meters.
    6) Magnified date window.
    7) LumiBrite hands and markers.
    8) Double locking clasp.
    9) Battery life of approximately 10 years.
    10) $270 retail.
    
    I got mine on the internet for about $160.  It is an excellent watch.
    It uses 6X the normal quartz rate of 32 KHz, or 192 KHz to get its high
    accuracy.
    
    ---
    
    The second watch to recommend is much more expensive, about $1000 on the
    internet.
    
    It is the Omega 1552.30 Perpetual Calendar with thermal compensation
    
    This watch has a thermally compensated movement.  If regulated, these
    watches
    are incredibly accurate.  A PhD friend of mine who works at the Jet
    Propulsion Lab
    has a regulated Omega which, after an entire year, is exactly on with WWV.
    Years
    ago he had another thermally compensated twin-quartz watch which was
    perfect, and
    then one day he noticed it was off by exactly a second.  A leap second had
    been
    inserted!  (They don't insert leap seconds much any more now...)
    
    Anyway, I have not regulated mine, which means opening up the back and
    adjusting
    the controls inside to get perfection.  I want to, but I have not yet bought
    a nice
    case opening tool.  I don't really want to scratch up a $1,000 watch!
    
    I bought the watch as a master timepiece for use with my sextants in case of
    GPS
    failure.  I wear it when I get dressed up.  Otherwise I use the Seiko, which
    is
    a great watch for the money.
    
    Neither of these watches has tons of features and gizmos.  For that I have a
    Casio
    watch with altimeter, barometer, magnetic fluxgate compass, etc.  I have not
    yet
    bought a GPS watch though... they are just too big for my taste.
    
    Dan
    
    -----Original Message-----
    
    From- Navigation Mailing List [mailto:NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM]On Behalf Of brian whatcott
    Sent: Wednesday, October 24, 2001 3:26 PM
    To: NAVIGATION-L{at}LISTSERV.WEBKAHUNA.COM
    Subject: Re: Online WWV time?
    
    I am tempted to rig a box with a velvet covered aluminum block, in which
    three chain store five year battery analog watches could be kept.
    Temperature stabilization is so helpful that a watch on your wrist
    maintained at a fair 98 degrees Fahrenheit can give a chronometer a run
    for its money.
    
    At least 2 of the 3 have a fair chance of surviving for a year or two....
    
    brian whatcott 
    

       
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