Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Pentwyn No. 3 Colliery, underground plan
Pentwyn No. 3 Colliery old workings in Upper Pinchin Seam. Scale 1/2500. Plan updated 26 March 1994. Folded.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.