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Amgueddfa Cymru – Museum Wales
A technical drawing/plan printed in black ink on off-white paper. Some details have been highlighted using green, brown and pink ink. 'National Coal Board S.W. Division Area No.9. Abernant Collliery Section Along No2 West Cross Cut.' Seams : Big, Black, Peacock, Brynlloi, Middle, Lower. Scale : 1:5000 Dated 6.7.55.
