Aluminium Silk Wound Conversation Tube

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An unusual early 20th century conversation tube. The ear and mouthpiece are made from aluminium (which would have been a luxury and expensive material in these times). The connecting tube is bound with woven silk.

The mouth piece is configured so that it can be held over the mouth in much the same way as an anesthetic mask, and which allows the transmission of even the faintest whisper.

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