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Amgueddfa Cymru – Museum Wales
Two copies of the same plan. A copy of a blueprint on white paper. Both contain sketches or notes handwritten on the plan. 88.99I/11 (1) contains a sketch in pen on the plan. 88.99I/11 (2) contains notes handwritten in pencil on the plan. 'National Coal Board S.W. Division Abernant Colliery Proposed underground layout Isometric Drawing' Scale : 1:10560 Dated 27.7.55.
