Brecknockshire XLIII.SW (6 inch to the mile) - Brecknockshire XLIII.SW (6 inch to the mile)
OS revised: 1914, Geological Survey surveyed: 1898 to 1899, Revised (coal measures): 1939 to 1940, Published: 1946 Size: map 31 x 46 cm (ca. 12 x 18 inches), on sheet ca. 47 x 67 cm (ca. 18 x 26 inches)