Derbyshire 17se, 6". Crowhole, 1899/1921, black outline and contours, blue geology.
Derbyshire 17se, 6". Crowhole, 1899/1921, black outline and contours, blue geology. 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.