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WOW Datum Rule
MANUFACTURING AND DISPENSING EQUIPMENT
datum rule
Willesden Optical Works Ltd
Europe: United Kingdom, England, London
Mid 20th c.
plastic; metal
overall: 210 x 75 mm

Ivorine plastic rule. Printed scales on upper side. Reverse side blank. White metal parallel bars pivoted from sides with adjustable width. Includes scales for joint width, inset distance, bridge height and segment height below the datum line.


2004.299

Gift of Mrs Janet Clay in memory of her mother Mrs Mona Dunkerley, 2004



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