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A delightful and very rare antique
hearing aid. The ear pieces are moulded to fit around the pinnae.
They are made from two plates, one tin (I think) which rests on
skin, the other copper which has fleshed toned colouring (hence
'Invisible'). The auditory benefits were attributed to magnetism and
the box comes with its own 'Galvanometer' (which is actually a
simple compass) and does confirm that they are magnetic. Each plate
is marked "Audiphone, Bernard Cie, 7 Rue De Londres
Paris". The silk lined box is also engraved as shown and is in good
condition, noting a repair to the hinge. This set would of course be
equally at home in the quackery section |
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