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Amgueddfa Cymru – Museum Wales
Title on cover "Ordnance Sheet: Cymmer Colliery: J.H.I". Ordnance survey map, sheet XXVII, surveyed in 1874-5. Scale 6 inches = 1 mile Folding map inside black leather covers with title in gold on front cover. Map is printed in black ink on white paper and mounted on a linen backing. Certain areas of the map are highlighted in colour.
