NPRNTeitlMath O SaflePerthynasNPRN270450TeitlAnti-Tank Block, Nant Ffrancon Anti-Invasion DefencesMath O Saflen/aPerthynasAssociated withNPRN419781TeitlNant Ffrancon Anti-Invasion DefencesMath O Saflen/aPerthynasPart ofNPRN418763TeitlRhaeadr Ogwen: Sheepfold/Second World War Battery House or PillboxMath O Saflen/aPerthynasAssociated withNPRN419780TeitlMortar Emplacement, Nant Ffrancon Anti-Invasion DefencesMath O Saflen/aPerthynasAssociated withNPRN270349TeitlSpigot Mortar Emplacement, Nant Ffrancon Anti-Invasion DefencesMath O Saflen/aPerthynasAssociated withNPRN419778TeitlMortar Emplacement, Nant Ffrancon Anti-Invasion DefencesMath O Saflen/aPerthynasAssociated withNPRN270451TeitlSpigot Mortar Emplacement, Nant Ffrancon Anti-Invasion DefencesMath O Saflen/aPerthynasAssociated with
