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    SNO-M vs C. Plath
    From: Alexandre Eremenko
    Date: 2012 Mar 12, 01:16 -0400

    Frank,
    
    > There wasn't an easy way to do that an hour and a half ago, but now there is.
    
    Thanks for this useful feature. Can you make it case-sensitive?
    
    While trying it, I discovered that I was absent from the list not 5 years
    as I said before but only since 2009 :-)
    In the last thread of 2009 that I participated the question was discussed
    whether certain C.Plath's of WWII Kriegsmarine on e-bay are fake.
    They looked suspiciously similar to SNO-M.
    
    I investigated the matter. These are indeed genuine C-Plath, little
    known model.
    Apparently SNO-M was an exact copy of it.
    As a proof, look at the picture
    http://www.math.purdue.edu/~eremenko/Navigation/submarine.jpg
    There is little doubt that this is a genuine war time photo of a German
    navigator, and he holds this "fake" C.Plath.
    
    One Russian seller told me (as a secret) that there was some old cache
    in a Soviet navy storehouse in the former East Prussia (now Russian
    Kaliningrad
    region) full of these "SNO-M". And the
    boxes are marked SNO-M.
    However when you scratch the paint on the sextant arm, the German insignia
    opens...
    He said that these Kriegsmarine C.Plaths on e-bay come from this storage.
    One difference is that the drum on a German-made C.Plath was of white
    plastic while on SNO-M it is of metal painted khaki.
    
    (After he told me the story I sent him the photo. So he may use it now
    for advertising:-)
    Somehow I was sure that I told this story on the list. But my last
    postings
    of 2009 show that I did not... So I am teling it now.
    
    Alex.
    
    
    Go to the
    top of the NavList main page and look for the link that says
    "generate custom index". It should be self-explanatory. If you want all 
    messages in a thread with a reasonably specific subject, it works fine. But 
    if the subject is generic, you will get hits for multiple threads. For 
    example, try setting the low date to 200101 and the high date to 201201 and 
    in the subject field enter "lunar distances" (without the quotes). Leave the 
    author field blank and hit 'Generate Index'. You will find that it returns 
    all messages from about two dozen different threads. Now go back and change 
    the subject to "Grenadine lunar". That's very specific so it returns all the 
    messages in one single thread ...from nine years ago.
    >
    > -FER
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