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opticians rule
OPTOMETRIC INSTRUMENTS
rule
Europe: United Kingdom
Early-mid 20th c
plastic
overall: 44 x 133 mm

Rectangular rule. White imitation ivory. One bevelled edge. Upper surface has three oval scales, imperial and metric rules. Lower surface has marked centre line, one lens size gauge, bridge and eye width scales.


2003.80

Gift of Marion Newns, 2003



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2003.80b.jpg

2003.80.jpg

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