Conversation tube hearing aid

1860-1900

Conversation tube hearing aid, probably English, 1870-1895

1870-1895

Conversation tube hearing aid

1840-1900

Conversation tube hearing aid

1840-1900

Swan-shaped ear trumpet

1801-1900

Hearing aid

1801-1900

Conversation tube hearing aid, Europe, 1850-1920

1850-1920

Vulcanite conversation tube hearing aid

1860-1920

Conversation tube hearing aid

1851-1900

Long leather covered metal ear trumpet hearing aid

1880-1910