Flat copper disc used for voice recording

Made:
1930
maker:
Sherard Osborn Cowper-Coles
Flat copper disc used for voice recording known as Minivoice'

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Flat copper disc used for voice recording known as Minivoice'
Science Museum Group
© The Board of Trustees of the Science Museum

Flat copper disc used for voice recording known as "Minivoice".Made by Cowper Coles in 1930.

Details

Category:
Metallurgy
Object Number:
2002-212
Materials:
copper (metal)
Measurements:
: .0394 x 6.0236 in.; 1 x 153 mm
type:
copper disc
credit:
Mr. Peter Cowper-Coles.