NPRNTeitlMath O SaflePerthynasNPRN33711TeitlGreat Western Colliery: Hetty Pit Winder House and Headframe, Pontypridd; Ty Mawr CollieryMath O Saflen/aPerthynasAssociated withNPRN275874TeitlGreat Western Colliery: Hetty Pit, PontypriddMath O Saflen/aPerthynasPart of
