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IGY rule
MANUFACTURING AND DISPENSING EQUIPMENT
rule
Datum Optica; Tedder Associates
Europe: United Kingdom, England, Lancashire, Southport
1989
plastic; card
outer packet: 99 mm x 210 mm x 5 mm; overall: 65 mm x 170 mm

Optician's rule, particularly for use when fitting bifocal and varifocal spectacle lenses. Clear plastic, reversible, with scales marked on both sides. Contained within white card wallet featuring colour-coded key.


2016.889

Gift of Mr Brian Mitchell, 2010



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