Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Crown Mine, plan
'Crown Mine. Plan of No.3 Seam Workings Shewing Method of Co-ordinate Plotting.' Scale 1 inch to 1 chain. Dated April 1923.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.