Millers Terrace Sign

Anyone know anything about this old enamel sign on Millers Terrace off Stoke Newington High Street? It is mounted high up and fairly close to the standard Hackney Borough street sign which also looks 50+ years old. This sign looks very old and although very faded seems to have no other text on it. @Sam Roberts does this qualify as a ghost sign?
https://www.flickr.com/photos/traxcitement/14105233560/