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Amgueddfa Cymru – Museum Wales
Copy of a plan, black ink on off-white paper. Certain details/ features have been highlighted using green, yellow, pink and blue pencil. There is a key for the colour-coding in the top left hand side of the plan. 'National Coal Board S.W. Division Area No.9 Proposed Pit Bottom Circuit 8200' Horizon Abernant Colliery' Scale : 1:500 Dated 20/5/55.
