Oval spectrum blue parallel glass

Oval spectrum blue parallel glass for protectors spectacles.

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Oval spectrum blue parallel glass for protectors spectacles.
Science Museum Group
© The Board of Trustees of the Science Museum

Oval spectrum blue parallel glass for protectors spectacles.

Details

Category:
Optics
Object Number:
1921-323/72
Measurements:
overall: 40 x 30 mm
type:
ophthalmic lens
credit:
Dunscombe collection of spectacles