Collection search - Signal Service: Buzzer or telephone in the danger zone, instructions re. - Abbreviations for, notes on the working of, Popham panel, instructions for the using of, with diagrams, etc
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Record information – Brief 
Signal Service: Buzzer or telephone in the danger zone, instructions re. - Abbreviations for, notes on the working of, Popham panel, instructions for the using of, with diagrams, etc
Hierarchical level:FileDate:1917/04/01-1918/10/24Reference:RG 9 III-C-3, Volume number: 4033, File number: Folder 5, file 4, File part: 5.4File no. (creator):Folder 5, file 4, G, I.G., O.B.Type of material:Textual materialFound in:Archives / Collections and FondsItem ID number:4217031Context of this record: -
Record information – Details Date(s):1917/04/01-1918/10/24Place of creation:No place, unknown, or undeterminedLanguage of material:EnglishFinding aid no.:Source:GovernmentFormer archival reference no.: -
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