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    Re: Does anyone know the history of this instrument?
    From: Paul Saffo
    Date: 2009 Sep 8, 06:35 -0700

    There is one in the NMAH collection. See:
    http://americanhistory.si.edu/collections/navigation/object.cfm?recordnumber=123471
    
    And one in the NMM. See:
    http://www.nmm.ac.uk/collections/explore/object.cfm?ID=ZBA0747
    
    best
    -p
    
    On Sep 7, 6:20�pm, bruce hamilton  wrote:
    > http://cgi.ebay.ca/US-WWII-1942-BUBBLE-CIRCLE-SEXTANT-AERONAUTICS-U-S...
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