Back when I was a student, early 80s, at one point I had access to a cellar which served as a bike shed. Right at the back, behind bits of junk and under layers of gunk and cobwebbery was a bike like that. Complete with miniature reg plate and (empty) licence holder.
I did entertain thoughts of finding out who owned it, buying it, and doing it up as a summer project. But of course I never did.
Who knows, it may still be there.