This ring was used to hold a concrete pipe that ran along the top of the Berlin Wall to prevent potential climbers being able to grip the top of the wall and climb over. The side of the wall facing the East German side was painted white to highlight any figures against the wall. The white paint is still on the ring. In the photo a piece of the wall (white with graffiti in green) is mounted within the ring. This particular ring was on the Wall in Steinstucken which was a small salient in the South of Berlin that was the subject of much difficulty between the East German Authorities and the West until a corridor was built (will the wall down each side of the road!) in 1971. This item was collected by me and my family in in April 1990 (I was the serving with the Allied Forces in Berlin) and has been in my possession at home since then.