Slab ground flat and shaped

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

Slab ground flat and shaped, with a reading curve depressed on one face. Ready for fusing stage in the manufacture of 'Kryptok' bi-focal spectacle lenses.

Details

Category:: Optics

Object Number:: 1921-323/55

Measurements:: overall: 50 mm

type:: ophthalmic lens

credit:: Dunscombe collection of spectacles

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