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Europe: United Kingdom
Mid 20th c.
overall: 720 x 560 x 270 mm
Illuminated test chart. Black wooden casing with removable front providing access to light wells. 4 light bulbs. Fan chart and revolving diamond test for astigmatism (controlled by wheel to lower left of casing). Revolving octagonal barrel bearing seven test types 6-6 to 6-45 controlled by wheel on left side of casing. Three line test chart with reversed lettering types 6-24 to 6-60. 3 switches on left side. Wall brackets to top at back of casing. Electrical flex cut short.
Gift of John D.M. Skirrow, 2001