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Dr Emil Hegg's Stereoscopic Charts for Squinters
ORTHOPTIC INSTRUMENTS
stereoscope card
Europe: Switzerland, Bern
Early-Mid 20th c.
card
each card: 80 x 170 mm

Set of 6 stereoscope cards featuring circular shapes and patterns. Contents: IV.1 17; IV.4 14; IV.5 13; IV.6 12; IV.7 11; IV.8 10. Inscribed in German, French and English.


1999.4113

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