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Giles-Archer Colour Unit (Standard Model)
COLOUR VISION TESTS
colour vision test lantern
Europe: United Kingdom
c.1935
metal
overall: 120 mm x 68 mm

Colour unit. Black metal cylinder with attached revolving lens disc featuring five coloured lenses and one aperture. Sliding bar behind the lens disc with three apertures. Internal bulb holder and Osram 15 watt pigmy bulb.


1999.3067

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