Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Cymmer Colliery, section
Vertical section through strata showing coal seams. Cymmer Colliery, Porth. Scale 1" to 30'. 1911.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.
Amgueddfa Cymru
Vertical section through strata showing coal seams. Cymmer Colliery, Porth. Scale 1" to 30'. 1911.