Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Cory Brothers & Co Ltd, chart
Chart titled 'Cory Brothers & Co Ltd. Screen Analyses, Ash and Free Dirt Contents of Small Coals'. Dated June 1932. Black print on cream paper.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.