'Helical' spring folding eyeglasses with oval lenses

'Helical' spring folding eyeglasses with oval lenses

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'Helical' spring folding eyeglasses with oval lenses
Science Museum Group
© The Board of Trustees of the Science Museum

'Helical' spring folding eyeglasses with oval lenses, made by John Braham, Bristol, 1828-1838 to Braham's patent No. 389, in 1861.

Details

Category:
Optics
Object Number:
1921-323/279
Materials:
metal, steel, plastic (unidentified) and glass
Measurements:
overall: 32 mm x 110 mm x 4 mm, , .01kg
type:
nose spectacles - pince nez
credit:
Dunscombe collection of spectacles