Siemens/Fortiphone Model 300017 Carbon Hearing Aid
The Siemens/Fortiphone Model 300017 carbon hearing aid was made
around 1930. The actual hearing aid was made by Siemens & Halske A.
G. of Germany,
while the resonant black leatherette-covered case was made by Fortiphone
Ltd. of London, England. Fortiphone put the hearing aid in the case and
sold it under the Fortiphone trade name.
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The Siemens/Fortiphone Model 300017 carbon hearing aid in its resonant
case. You could use it this way by placing the case on a table facing
the person to whom you were speaking. The receiver cord came out through
the small slot on the top center of the left side. The hearing aid and
resonant case
together weighed just 10 oz. without the battery.
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Front view of Siemens/Fortiphone Model 300017 carbon hearing aid microphone.
This microphone measured 4⅜" x 2⅛" x ½" thick. This
microphone was exceptionally light at just 2 oz. The microphone had a
leather button-hole attached to the back (right). This way the microphone could
be attached to any button on the wearer's shirt. Alternately, a black
ribbon could be threaded through the button hole (as shown) and worn as a lanyard
around the wearer's neck.
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Rear view of Siemens/Fortiphone Model 300017 carbon hearing aid microphone. Engraved on the back
(center) are the words "Siemens & Halske A. G. Germany"
The serial number "10990" is partially hidden by the leather tab on
the left.
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Side view of Siemens/Fortiphone Model 300017 carbon hearing aid
microphone showing how exceptionally thin this microphone was at only
½".
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Top view of the slider volume control/off switch for the Siemens/Fortiphone Model
300017 carbon hearing aid. The off position was at the far right.
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The receiver (right) and stock ear mold (left) of the Siemens/Fortiphone Model
300017 carbon
hearing aid.
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View of Siemens/Fortiphone Model 300017 carbon hearing aid receiver
(right) and flesh-colored stock ear mold. Unlike the above ear mold,
this ear mold incorporated an ear hook to help hold it in the ear canal.
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View of stock ear mold (left) and receiver of the Siemens/Fortiphone
Model 300017 carbon hearing aid. The ear mold snapped into the hole in the
receiver.
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The battery plug of the Siemens/Fortiphone Model 300017 carbon hearing
aid. This hearing aid
used 4.5 volt carbon-zinc batteries and plugged into batteries such as the
Siemens? X43/R656 or the
Fortiphone 3-S.
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The Siemens/Fortiphone Model 300017 carbon hearing aid in its original resonant
case.
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Outside view of the Siemens/ Fortiphone Model 300017 carbon hearing aid
resonant case. The case measured 6¼" x 3⅝" x 2⅜".
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