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W.O.W. Cone Rule
MANUFACTURING AND DISPENSING EQUIPMENT
rule
Willesden Optical Works Ltd
Europe: United Kingdom
20th c.
plastic
overall: 105 x 30 x 25 mm

Unusually shaped white plastic measure with tapering curving face for measurement of bridge radius (scale 5-13 mm) and scale for measuring base 10mm below bridge (10-26mm).


2003.204

Gift of the Essex County Hospital, 2003



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