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Effective Diameter Chart
MANUFACTURING AND DISPENSING EQUIPMENT
protractor
Norville Optical Co; Smiths (Calculators) Ltd
Europe: United Kingdom, England, Gloucestershire, Gloucester; Europe: United Kingdom, England, Devon, Beaminster
c.1981
plastic; card
overall: 227 mm x 139 mm

Laminated white plastic lens diameter chart printed in black and red. Set of notes, taped to the back, on determining size of lens required to glaze a frame.


1999.4183

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