Colchester area.
Great Britain.War Office.General Staff.Geographical Section.
[London] : War Office,
1933 (rep. 1939)
Relief shown by contours, and spot heights.
Base map: Ordnance Survey of England and Wales.
Overprinted with military grid in purple.
"8000/34. 100/35. 1000/35. 10,000/39. C."