Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Tydraw & Glenrhondda Collieries, plan
Full title - Glenrhondda & Tydraw Collieries. 4'-0" Seam Workings. Scale 6" to a Mile. Datum for Levels - 2000' B.O.D.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.