Optical rule, plastic, probably British, 1950-1970

Made:
1950-1970
Optical rule, plastic, probably British, 1950-1970

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Optical rule, plastic, probably British, 1950-1970
Science Museum Group
© The Board of Trustees of the Science Museum

Optical rule, plastic, probably British, 1950-1970

Details

Category:
Ophthalmology
Object Number:
1987-590
Materials:
plastic
Measurements:
overall: 3 mm x 227 mm x 37 mm, .01 kg
type:
optical rules
credit:
Christie's South Kensington Limited