This 1950s advertisement for Bovril on Beaconsfield Rd, Leicester, is a fine example of what is commonly called a 'Ghost sign'. These painted advertisements can be found on buildings all over the world. They gradually fade over time - hence the 'ghost' - and sometimes reveal older advertisements, often created with more durable paint, underneath. Photos of Ghost signs can be found on Flickr and at this blog: http://brickads.blogspot.com/
