Round white 'Kryptok' tonc bi-focal spectacle lens

Round white 'Kryptok' tonc bi-focal spectacle lens

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Round white 'Kryptok' tonc bi-focal spectacle lens
Science Museum Group
© The Board of Trustees of the Science Museum

Round white 'Kryptok' tonc bi-focal spectacle lens, ground and polished on segment side.

Details

Category:
Optics
Object Number:
1921-323/61
Measurements:
overall: 46 mm
type:
ophthalmic lens
credit:
Dunscombe collection of spectacles