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Dr Emil Hegg's Stereoscopic Charts for Squinters
ORTHOPTIC INSTRUMENTS
stereoscope card set
A. Francke S.A.
Europe: Switzerland, Bern
1914
card
overall: 175 x 92 x 20 mm
2007.46
ORTHOPTIC INSTRUMENTS
stereoscope card set
A. Francke S.A.
Europe: Switzerland, Bern
1914
card
overall: 175 x 92 x 20 mm
Set of 85 black and white and colour stereoscopic charts, divided into 9 series. Includes geometric, pictorial and photographic examples of charts. Includes Schlechteres Auge test. Contained in cardboard box labelled in English on one side and French on the other. Together with instruction leaflet translated into English from the German by G. R. Young. (5th Edition).
2007.46