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Category
Audiology
1
Object type
electrical
1
hearing (aids)
1
hearing aids
1
transistors
1
Material
case, leatherette
1
earpiece, acrylic
1
earpiece, polythene
1
lining, fabric
1
lining, velvet
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power unit, plastic
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Date
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Transistorised hearing aid, cased, English, 1950-1965
Transistorised hearing aid, cased, English, 1950-1
Audiology
1950-1965
