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Amgueddfa Cymru – Museum Wales
Typed in black ink on off-white paper. Four letters of correspondence between A.Z.C. James of Powell Duffryn Limited and Edgar Williams of the National Coal Board with regards to T.S. classifications. Letters dated 27 November and the 3,4 and 5 December 1951. Loose within beige/light brown card file containing information relating to Powell Duffryn Ltd.
