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Williamson-Noble Scotoma Detector
OPTOMETRIC INSTRUMENTS
perimetry test
Hamblin Ltd
Europe: United Kingdom, England, London
c.1953
plastic
overall: 28 x 156 x 26 mm; length of line: 330 mm

White plastic rule with slider and attached plumb line cord with round ring weights.


2003.124

Ex Keeler Collection



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2003.124b.jpg

2003.124.jpg

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