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Title: Electrically maintained tuning fork by Philip Harris Ltd [Go to resource]
Description: Electrically maintained tuning fork by Philip Harris Ltd., Catalogue No. P9962, 1960 to 1970, nominal frequency 256Hz. License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Temporal: 1960-1969 Source: Science Museum Creator: Philip Harris Ltd Identifier: 1985-1473 Go to resource More Like this...
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