Derbyshire 40nw, 6". Bullbridge, 1900/1910, black outline, blue geology.
Derbyshire 40nw, 6". Bullbridge, 1900/1910, black outline, 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.