Stereosimplex conversion kit [to terrestrial photogrammetry] Stereosimplex conversion kit to terrestrial photogrammetry
The Bloggoscope, for determining tilt in aerial photographs Bloggoscope, British, 1924-1939 1924-1939
Stereo-plotter designed by F.V. Thompson, made by W.Watson and Sons, probably c. 1906 Stereo-plotter designed by F.V. Thompson 1906
