File MS-4-180, Box 9, Folder 20, Item 2 - Don Young the central office manager assigned to the new 421 exchange in the basement of the Maritime Centre examines a plug-in board from the SL-1 switching machine

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Don Young the central office manager assigned to the new 421 exchange in the basement of the Maritime Centre examines a plug-in board from the SL-1 switching machine

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MS-4-180, Box 9, Folder 20, Item 2

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  • June 1977 (Creation)

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1 photograph : b&w ; 25.5 x 20.5 cm

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Photograph of Don Young holding a plug-in board.

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Photograph was included in the June 1977 Monthly Bulletin on page 4.

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