Source
Translation
1) Concrete wall with or without pipe on top
2) Metal latticework fence
3) Checkpoint area
4) Lighting system
5) Anti-vehicle trench
6) Line marking the front boundary of the border patrol
7) Column track
8) Wire run for guard-dogs
9) Signal or warning light
10) Observation tower
11) Electric fence
Source: Skizze einer Grenzanlage in Berlin (Sketch of a Border Fortification in Berlin), Presse- und Informationsamt des Senats von Berlin, 1984.