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Hamblin Checking Chart (Optician's rule)
MANUFACTURING AND DISPENSING EQUIPMENT
rule
Theodore Hamblin Ltd
Europe: United Kingdom, England, London
1930s
cardboard
overall: 143 x 192 mm
2000.357
MANUFACTURING AND DISPENSING EQUIPMENT
rule
Theodore Hamblin Ltd
Europe: United Kingdom, England, London
1930s
cardboard
overall: 143 x 192 mm
Printed paper rule with cardboard backing board. Features protractor and temple width scale.
2000.357
Gift of Dollond & Aitchison Ltd, 2000