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Dr Emil Hegg's Stereoscopic Charts for Squinters
ORTHOPTIC INSTRUMENTS
stereoscope card set
Europe: Switzerland
Early-Mid 20th c.
card
each card: 80 x 170 mm
1999.4114
ORTHOPTIC INSTRUMENTS
stereoscope card set
Europe: Switzerland
Early-Mid 20th c.
card
each card: 80 x 170 mm
Set of 31 stereoscope cards featuring dots and shapes, coloured pictures of children and animals and a binocular reading card.
1999.4114