Square 'Kryptok' fused slab and segment

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

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

Square 'Kryptok' fused slab and segment, amethyst tint with ground edges, stage in making bi-focal spectacle lens.

Details

Category:: Optics

Object Number:: 1921-323/64

Measurements:: overall: 45 x 45 mm

type:: ophthalmic lens

credit:: Dunscombe collection of spectacles

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