Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Folder
Folder containing various N.C.B. memos and minutes relating to Big Pit, Blaenavon Mine, 1965-1976 and a report by N.C.B. South Wales Area Scientific Department titled 'Examination of 26mm Plough Chain Links Failed During Tensioning G9's Face Blaenavon Colliery', 25 September 1978.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.