Round 'Kryptok' fused slab and segment

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

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Round 'Kryptok' fused slab and segment
Science Museum Group
© The Board of Trustees of the Science Museum

Round 'Kryptok' fused slab and segment, dark 'Chlorophylle' tint, stage in making bi-focal spectacle lens.

Details

Category:: Optics

Object Number:: 1921-323/69

Measurements:: overall: 48 mm

type:: ophthalmic lens

credit:: Dunscombe collection of spectacles

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