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Actions	Details Remove from selection Add to selection Title Transmitter valves MR6 MT6 T450 MR4 Reference NAEST 186/09 Date c 1920 Scope and Content Photograph Physical description Number of pieces: 1 Language English. Subject Transmitters, Valves Level of description file Hierarchy browser 110000001 NATIONAL ARCHIVE FOR ELECTRICAL SCIENCE AND TECHNOLOGY contains 334 parts UK0108 NAEST 186 Dalton collection of radio slides contains 53 parts NAEST 186/09 Transmitter valves MR6 MT6 T450 MR4

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