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Telecommunications
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Muirhead and Company Limited
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Time Switch
Time switch type D-345- no. 176118 by Muirhead and Co. Ltd.
1950
Time switch type D-345-A no. 136441 by Muirhead and Co. Ltd
Time switch type D-345-A
Time switch type D-345-A no. 136442 by Muirhead and Co. Ltd.
