Folding opera glasses, French patent, in velvet case

Folding opera glasses, French patent, unsigned, Europe

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Folding opera glasses, French patent, unsigned, Europe
Science Museum Group
© The Board of Trustees of the Science Museum

Folding opera glasses, French patent, unsigned, Europe, 1850-1950

Details

Category:
Optics
Object Number:
1990-286/1
Materials:
leather, brass (copper, zinc alloy) and glass
Measurements:
overall: .2456kg
opera glasses: 11 mm 35 mm,
type:
opera glasses and binoculars