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combined lorgnette & ear trumpet
Late 19th c.
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combined lorgnette & ear-trumpet
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Conversation tube
Eschmann Bros. & Walsh Ltd
1976
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Conversation tube
Early-Mid 20thc.
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Hearing Aid Spectacles V-Series T-Version
Widex A/S; The Eastbourne Hearing Centre
1986
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Phonak VS-III Hearing Aid Spectacles
Phonak AG
1960s?
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