Detachable clip-on blue sunglass lenses

Detachable clip-on blue corrective sunglass lenses (?) with

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Detachable clip-on blue corrective sunglass lenses (?) with
Science Museum Group
© The Board of Trustees of the Science Museum

Detachable clip-on blue corrective sunglass lenses (?) with silver plated nickel silver frames and spring bridge, unsigned, British, 1860-1910. Supplied by C. W. Dixey and Son, London, England.

Details

Category:
Optics
Object Number:
2000-831/22
Materials:
nickel silver (nickel, copper, zinc alloy), silver plated and glass
Measurements:
overall: 12 mm x 110 mm x 55 mm, Wt. 0.021kg
type:
sun-glasses