Archive6514453Title73_082_0672 - Ordnance Survey Vertical Aerial Photography CollectionLevelItemDescriptionBlack and white aerial photograph of Cwm Penmachno taken by the Ordnance Survey on 17th April 1973 at an altitude of 7500 feet. Grid reference SH7547. Print enlargement (c. 20") taken from 9" film roll.MediumPhoto.Imagesn
