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    Re: Advice on Sextant
    From: Bill Morris
    Date: 2009 Aug 4, 01:18 -0700

    Chris wrote
    "The SNO-T is basically a copy of the Plath."
    
    This is certainly true of the SNO-M (the cyryllic C and H correspond to the 
    English S and N). The C Plath satellite factories which had been moved to the 
    east in WWII to escape bombing in Hamburg were abandoned to the Russian 
    advance and the wartime aluminium alloy C Plath became the Russian postwar 
    SNO-M. The frame and nearly all the other parts appear to have been die-cast 
    in the same dies. The SNO-M comes  with only a x 6 inverting telescope. Good 
    as they are, they are no match for....
    
    The SNO-T (SNO-T if you must), Sextan Navigacionnyi s Osvetitelem-T or 
    tropicalised navigational sextant with illumination, is based on the 
    Freiberger Prazisionsmechanik Trommelsextant or vice-versa. The early 
    examples of the Freiberger were identical with the SNO-T. Later ones were 
    more lightly built and probably inferior to the SNO-T, which is a formidable 
    and seriously under-valued instrument. Both have Zeiss optics. The SNO-T has 
    a 4 x 40mm Galilean  and 6 x 30mm inverting scope, while the Freiberger has 
    only a 4 x 40 Galilean.
    
    The SNO-T is let down by its case, which is not up to the task of protecting 
    the instrument in transit. If you do buy one, impress on the sender that 
    there must be plenty of packaging included _inside_ the case, to protect the 
    sextant if it breaks loose from its moorings.
    
    By the way, aluminium alloy frames are generally superior to bronze ones in 
    spite of being rather cheaper.
    
    Bill Morris
    Pukenui
    New Zealand
    
    
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