MusEYEum Online Catalogue

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'Calthorpe' test chart
TEST CHARTS
illuminated test chart
Calthorpe
Europe: United Kingdom
c.1963
metal
overall: 845 x 672 x 232 mm

Test chart. Wall-mounted grey-painted and black metal cabinet with control box suspended beneath (9 brown push controls and one black revolving knob to control astigmatic disc). Electrically illluminated. Front panel secured to unit with cabin hooks. Astigmatic fan, Snellen test type (6-4.5) chart and duochrome test.


2003.135

Gift of Mr Ron Rabbetts, 2003



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