The County Series mapping is the oldest mapping available from Ordnance Survey.
These full sheet Ordnance Survey historical maps include all the original map marginalia.
6" to the mile and 25" to the mile scales available.
6" to 1 mile (1:10,560) would typically show area detail including Street Names, Road Detail, Railways, Parish Boundaries etc.
25" to 1 mile (1:2500) would typically show greater detail including Street Names, Road Detail, Property Outlines, Railways, Height Detail (Bench Marks) etc.
Mapping is supplied on high quality white paper printed from scanned images of the original maps, these maps were scanned at 500dpi giving a higher resolution imagery .