'Kryptok' tonic bi-focal complete spectacle lens

PART OF:: Display board of spectacles and lenses, c.1921

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Oval white 'Kryptok' tonic bi-focal complete spectacle lens
Science Museum Group
© The Board of Trustees of the Science Museum

Oval white 'Kryptok' tonic bi-focal complete spectacle lens with a ground edge.

Details

Category:: Optics

Object Number:: 1921-323/62

Measurements:: overall: 45 x 42 mm

type:: ophthalmic lens

credit:: Dunscombe collection of spectacles

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