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Norville Check List No 11 - Edge Substance - Minus Powers
ARCHIVAL ITEMS
selection chart; catalogue
Norville Optical Company Limited
Europe: United Kingdom, England, Gloucestershire, Gloucester
October 1991
paper
overall: 210 x 296 mm

Selection chart tabulating the available average edge substances for different index lens materials at various diameters. A4 landscape format, printed in black on one side only of a single sheet of white paper.


2006.827

Gift of the Norville Group, 2006



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