I'm close to purchasing a small terrace house in the South of England, and during my visit I noticed this object shown in the photo attached that has been cemented into a hole in the rear wall of the house.
The object is copper and appears to resemble a door knob but it's of a different shape so I don't think it is.
I'd like to understand what this object is which could help me understand why it's been cemented into a hole in the wall.
My only thought is that it could be to attach one end of a clothes line in the garden.
