Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Tydraw & Glenrhondda Collieries, plan
Full title - Glenrhondda & Tydraw Collieries. Workings in the 2'-9" Seam. 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.