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Board of Trade Colour Vision Test Lantern Board of Trade 1912 View |
Edridge-Green Lantern / Colour Perception Lamp Rayner c.1935 View |
Giles-Archer Colour Unit (Aviation Model) R. Archer & Sons Ltd 1950s? View |
Giles-Archer Colour Unit (Aviation Model) c.1935 View |
Giles-Archer Colour Unit (Standard Model) c.1935 View |
Holmes-Wright Colour Perception Lantern Type 'B' M.S. Precision Products Ltd 1974 View |
Lantern Test - Pairs of Colours Fletcher, R. J. 2010s View |
Pickford-Nicolson Anomaloscope Rayner c.1987 View |
test lantern 20th c. View |
test lantern Mid-late 20th c. View |
The Sloan Colour Threshold Tester (CTT) Sloan, Dr Louise L. Post 1944 View |