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1955-1973 (Creation)
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1.60 m of textual material, Vol. 11-15.
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Series consists of operational files relating to the COTC operation of the Yamachiche Station from the 1950s almost to its closing in 1975. It includes COTC memos and procedures 1965-1970; watchkeepers notices 1962-1967; technicians notices 1968-1971; monthly reports 1962-1969; weekly installation reports 1966-1968 and overseas test reports 1962-1968.
Sample telegraph and telephone logs and graphs showing signal strength for wireless circuits from Beijing, Bueno Aires, Frankfurt, Greenland, Lisbon, Lima, Moscow, Rio de Janeiro and St. Pierre-Miquelon. 1963-1973. Where multiple years of logs were present, the records from 1966-1967 were retained.