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Williamson-Noble Scotoma Detector
OPTOMETRIC INSTRUMENTS
perimetry test
Hamblin Ltd
Europe: United Kingdom
c.1953
plastic
overall: 28 x 156 x 26 mm; length of line: 330 mm
2003.124
OPTOMETRIC INSTRUMENTS
perimetry test
Hamblin Ltd
Europe: United Kingdom
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