Birkbys Viking
1972 Plessey Mouldings and Viking Industrial Plastics formed a joint company, Birkbys Viking, which would operate as an independent company; Plessey was a major shareholder<ref>The Times July 6, 1972<ref>
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1972 Plessey Mouldings and Viking Industrial Plastics formed a joint company, Birkbys Viking, which would operate as an independent company; Plessey was a major shareholder<ref>The Times July 6, 1972<ref>
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