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Gradal 2 selection chart / lens calculator
MANUFACTURING AND DISPENSING EQUIPMENT
centration chart
Zeiss
Europe: West Germany
May 1975
card; plastic
overall: 103 mm x 207 mm
2014.800
MANUFACTURING AND DISPENSING EQUIPMENT
centration chart
Zeiss
Europe: West Germany
May 1975
card; plastic
overall: 103 mm x 207 mm
Multifocal lens rule and sliding calculator printed on yellow card within clear plastic sleeve. Key in German, French and English.
2014.800
Gift of Mrs Margeurite Knight via Mr and Mrs Thompson, 2014