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Brown card folder containing 35 blast furnace cost sheets for Guest Keen Baldwins Iron & Steel Co's works. Blast furnace cost sheets for various dates during 1917, 1928, 1942 - 1943, 1945 -1950 and 1958. Data relates to blast furnaces costs at the company's works in East Moors, Dowlais, Briton Ferry, Port Talbot, Margam and Ebbw Vale. Printed, typed and handwritten cost sheets, some with cover letters.
