Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Ynismond Colliery, plan
Full title - Ynismond Colliery Four Feet Seam Scale 1:2500 Patum for Levels 10000Ft.BOD. Plan constructed Dec. 1970. Folded.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.