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Conversation tube hearing aid, probably English, 1870-1895

1870-1895

Conversation tube hearing aid

1880-1935

Conversation tube hearing aid

1880-1931

Conversation tube hearing aid

1840-1900

Speaking tube by Rein

1880-1920

Conversation tube hearing aid

1880-1916
Conversation tube hearing aid, also known as a speaking tube, with ivory earpiece and bell and rubberised fabric covered tube, by F.C. Rein, London, 1800-1860

Conversation tube hearing aid

1800-1860
Conversation tube hearing aid, also known as a speaking tube, by F. C. Rein & Son, London, c. 1900

Conversation tube hearing aid

1890-1920