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The Norville Calendar for 1980 Optical Illusions
ARCHIVAL ITEMS
calendar
Norville Optical Company Limited
Europe: United Kingdom, England, Gloucestershire, Gloucester
1980
paper; card
overall: 305 x 366 mm
2006.652
ARCHIVAL ITEMS
calendar
Norville Optical Company Limited
Europe: United Kingdom, England, Gloucestershire, Gloucester
1980
paper; card
overall: 305 x 366 mm
Promotional calendar featuring diagrams of 12 optical illusions: Distortion produced by background (3), examples of self-distortion, the Necker cube, reversible cubes, perspective (2), irradiation illusions, contrast illusions, impossible figures (2).
2006.652
Gift of Norville Optical Group, 2006