Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Powell Duffryn Steam Coal Co.Ltd, plan
Powder[?] magazine Bargoed Collieries The Powell Duffryn Steam Coal Co Ld., Scale ½ inch to 1 foot. June 29th 1897. drawer No.5 Drawing No. 7.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.