[sell-3d] Stereo comparagraph for sale

[Peter Abrahams <telscope@xxxxxxxxxx>]

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Stereo comparagraph, Fairchild Camera & Instrument Corp. Model 210. Patent
2,104,778.  Used to view two aerial photos, cannot converge enough to view
Holmes cards (but almost -  & looks easily converted to this).  Optics
provide two floating points, which are separable with a micrometer screw,
to provide precise measuring of deviation to deduce elevation of
topography.  Tracing arm is fitted with pencil to draw topo map onto
adjoining paper.  
Very finely made, precision optical instrument, 9 inches across.  With
photocopied instructions from various photogrammetry books.  With
illuminator, spare bulbs, auxiliary optics, tracing arm, in military box.
Appears unused, 4 front surface mirrors are immaculate, slight dust on
surface.  $275. + shipping.   Peter Abrahams, telscope@xxxxxxxxxx     I
check email regularly and will sell to the first definite reply.

_______________________________________
Peter Abrahams   telscope@xxxxxxxxxx   The history of the telescope & 
   the binocular:   http://www.europa.com/~telscope/binotele.htm