Archive NumberTitleLevelDescriptionMediumImagesArchive Number6530619Title85_159_0021 - Ordnance Survey Vertical Aerial Photography CollectionLevelItemDescriptionBlack and white aerial photograph of Bryn Du Gas Works, taken by the Ordnance Survey on 2nd July 1985 at an altitude of 8,300 feet. Grid reference SN9907. Print enlargement (c. 20") taken from 9" film roll.MediumPhoto.ImagesnArchive Number6150060Title925043_18 - RCAHMW Black and White Oblique Aerial PhotographsLevelItemDescriptionRCAHMW Black and white oblique aerial photograph of Bryn Du Gas Works, Hirwaun, taken on 17/10/1992 by CR MussonMediumPhoto.ImagesnArchive Number6049719Title92_CS_0976 - RCAHMW Colour Oblique Aerial PhotographsLevelItemDescriptionSlide of RCAHMW colour oblique aerial photograph of Bryn Du Gas Works, Hirwaun, taken by C.R. Musson, 17/10/1992.MediumPhoto.Imagesy
