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Amgueddfa Cymru – Museum Wales
17-page paper brochure inside a card file. Brown card file with embossed details in black and orange: 'The New Otto Coke Ovens: Bulletin Cover: Silica Coke Oven & Machinery Ltd.' The file also contains an embossed company logo. Inside the file is a brochure re. the new Otto coke ovens, printed in black and orange on white paper. Includes a number of black & white printed photographs & diagrams.
