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Title: Early bifocal lenses with rounded segments and oval lenses, [Go to resource]
Description: Early bifocal lenses with rounded segments and oval lenses, early 19th century. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: spectacles Temporal: 1800-1825 Source: Science Museum Identifier: 1921-323/185 Go to resource More Like this...
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