Oticon Model 825 Eyeglass Hearing Aid
The Oticon Model 825 eyeglass hearing aid was manufactured by Oticon A/S of Copenhagen, Denmark in 1960.
The Oticon 562 housed all the electronics in one temple-piece. The
other side was a dummy made to look exactly the same. In this case, the
hearing aid was contained in the right temple piece.
This hearing aid had 3 transistors.
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Top view of the Oticon Model 825 eyeglass hearing aid showing the
attractive style of the temple pieces. From the front, you wouldn't know
a person was wearing eyeglass hearing aids.
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The serial number (10653) was engraved on the bottom of the right temple piece.
The nubbin for attaching the ear mold tube (not shown) is at the bottom
right.
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The volume control was located midway on the underside of the right
temple piece (bottom left) ahead of the nubbin used for attaching the
ear mold tube.
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Outside view of the bottom of the right temple piece of the Oticon Model
825 eyeglass hearing aid showing the hole for the microphone port
(left).
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Inside view of the bottom of the right temple piece of the Oticon
Model 825 eyeglass hearing aid showing the manufacturer (Oticon) and the
model number (825) below it.
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View of the swing up battery compartment door of the Oticon Model 825
eyeglass hearing aid showing a 1.4 volt 675 mercury battery in place
such as the
Eveready EP675E battery. Note, the dummy temple piece on the other
side also had a working battery compartment door that held a spare
battery.
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Front view of the original leather carrying case of the Oticon Model
825 eyeglass hearing aid.
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