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set of binocular confirmation tests
OPTOMETRIC INSTRUMENTS
confirmation test
20th c.
metal; plastic; glass
overall: 117 mm x 50 mm

Set of three spherical twirls ('flippers'), each with white metal rim and plastic-coated handle with smooth grip (red, yellow and mauve). Double D-shaped lenses with red positive and white negative axis markings.


2012.66

Gift of Mrs Jill Evershed Martin, 2011



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