Collection search - Standardization, signals, central office telephone (manual) AN/TTC-4(US), exchange telephone central battery CB20 (UK)
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Record information – Brief 
Standardization, signals, central office telephone (manual) AN/TTC-4(US), exchange telephone central battery CB20 (UK)
Hierarchical level:FileDate:1957Reference:RG24-C-1-c, Volume number: 19713, File number: 8932-2-6-1File no. (creator):8932-2-6-1Type of material:Textual materialFound in:Archives / Collections and FondsItem ID number:5367738Context of this record: -
Record information – Details Date(s):1957Place of creation:No place, unknown, or undeterminedLanguage of material:EnglishFinding aid no.:Source:GovernmentFormer archival reference no.: -
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