Casgliadau Arlein

Ordnance survey contoured road map of Swansea & Aberdare, sheet 101, popular edition. The map has been hand-marked to show the positions of all gas and electricity undertakings in South Wales. Colour printed map, folded, with illustrated cover. The map has been hand-marked with coloured pens, with a handwritten reference key attached to the bottom left hand corner. The map was once the property of the Powell Duffryn Limited Chief Electrical Engineers Office, Ystrad Mynach. Scale 1": 1 mile Revised edition 1919/20.