Bi-focal spectacle lens

Made:
1899

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Oval white 'Kryptok' cemented bi-focal spectacle lens with protecting plate and ground edges, Patent No. 10773, AD 1899.

Details

Category:
Optics
Object Number:
1921-323/50
type:
ophthalmic lens
taxonomy:
  • component - object
  • spectacles component
credit:
Dunscombe collection of spectacles