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    Re: How does the AstraIIIb split mirror work?
    From: Jim Thompson
    Date: 2004 Apr 23, 22:32 -0300

    > -----Original Message-----
    > From: Joel Jacobs
    > A question for Jim T., is one or both of your mirrors front or back
    > silvered.
    
    Index mirror is front-silvered.
    Horizon mirror is back-silvered.
    
    I checked my sextant, but see also
    http://celestaire.com/catalog/Marine_Sextants/Astra_IIIB/
    
    Jim
    
    
    

       
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