Oval white 'Kryptok' fused bi-focal spectacle lens with ground edges

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

Made:: 1904

Oval white 'Kryptok' fused bi-focal spectacle lens with ground

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Oval white 'Kryptok' fused bi-focal spectacle lens with ground
Science Museum Group
© The Board of Trustees of the Science Museum

Oval white 'Kryptok' fused bi-focal spectacle lens with ground edges, separation impossible, Patent No. 18158, AD 1904.

Details

Category:: Optics

Object Number:: 1921-323/51

Measurements:: overall: 45 x 36 mm

type:: ophthalmic lens

credit:: Dunscombe collection of spectacles

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