Durham 5se, 6". Chopwell, 1921/1954, black outline, red geology.
Durham 5se, 6". Chopwell, 1921/1954, black outline, red geology. Includes part Northumberland 105se. In very good condition.
About the England Six Inch County Series (later edition)
These early 20th century geological maps are at 1:10,560 scale, based on county layout. Each sheet covers 2 x 3 miles in considerable detail.