Rare Befestigungskarte 1:1 000 000 Grossbritannien London-Süd

Rare Befestigungskarte or defence overprint 1:1 000 000 Grossbritannien London-Süd. This map contains all the RAF and British Army installation in the area south of London. This is a vital and secret map which is very hard to find, a special piece for the Battle of Brittain collector!