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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; metal
overall: 180 x 239 mm
2000.356
MANUFACTURING AND DISPENSING EQUIPMENT
rule
Theodore Hamblin Ltd
Europe: United Kingdom, England, London
1930s
cardboard; metal
overall: 180 x 239 mm
Laminated paper-on-metal rule with cardboard backing board and hanging cord. Features protractor and scales for deep PRO, PRO, Oval and half eye lens shapes.
2000.356
Gift of Dollond & Aitchison Ltd, 2000