Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    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
    The second watch to recommend is much more expensive, about $1000 on the
    It is the Omega 1552.30 Perpetual Calendar with thermal compensation
    This watch has a thermally compensated movement.  If regulated, these
    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.
    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
    inserted!  (They don't insert leap seconds much any more now...)
    Anyway, I have not regulated mine, which means opening up the back and
    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
    failure.  I wear it when I get dressed up.  Otherwise I use the Seiko, which
    a great watch for the money.
    Neither of these watches has tons of features and gizmos.  For that I have a
    watch with altimeter, barometer, magnetic fluxgate compass, etc.  I have not
    bought a GPS watch though... they are just too big for my taste.
    -----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
    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 

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site