This is an original 1920 one-page article (one single-sided page), "The Type-Reading Optophone" featuring images of the standard forms of the Optophone; and a diagram of the arrangement of the optophone, an electrical device which enables the blind to read ordinary type, invented by Dr. E. E. Fournier d'Albe of Birmingham University.
CONDITION
This 91+ year old Item is rated Near Mint / Very Fine+. No creases. No natural defects. No surface rub. No tears. No water damage.
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Product Type: Original Print Article; Black / White
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Grade: Near Mint / Very Fine+
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Dimensions: Approximately 10 x 12.5 inches; 25 x 32 cm
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Authentication: Serial-Numbered Certificate of Authenticity w/ Full Provenance
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Protection: Packaged in a custom archival sleeve with an acid-free black board (great for display, gift-giving, and preservation)
SCA3A11B6C20