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    Re: micrometer sextants.
    From: Wolfgang K�berer
    Date: 2007 Oct 28, 08:32 +0100

    FER wrote:
    
    >One ad shows a high-end vernier sextant
    >that has a micrometer drum, too.
    
    That was patented by C.Plath in 1921.  Patent number 358451A in Germany.
    
    Wolfgang
    
    
    
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