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Contact Lens Computer
ARCHIVAL ITEMS
selection chart
The Plastic Contact Lens Company
North America: USA, Illinois, Chicago
Mid 20th c.
plastic
overall: 206 mm x 53 mm

'Slide-rule' type calculating chart. Obverse = fitting guide and pupil gauge; Reverse = vertex distance and computed power. White inner card. Light green outer sheath overprinted in dark blue.


2014.282

Gift of Mrs Paula Chabrel, 2014



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