Collection search - Signal Service: Communications, Notes; Improvized "Buzzer Telephone Exchanges, Notes; Visual Signalling with Service Electric Lamps, Notes
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Record information – Brief 
Signal Service: Communications, Notes; Improvized "Buzzer Telephone Exchanges, Notes; Visual Signalling with Service Electric Lamps, Notes
Hierarchical level:FileDate:1915/08/01-1916/01/01Reference:RG 9 III-C-5, Volume number: 4369Type of material:Textual materialFound in:Archives / Collections and FondsItem ID number:3925360Context of this record: -
Record information – Details Date(s):1915/08/01-1916/01/01Place of creation:CanadaLanguage of material:EnglishFinding aid no.:Source:GovernmentFormer archival reference no.: -
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