I read it in a book of funny graffiti examples that my parents had about 35 years ago, hth(, Mon 13 Jul 2026, 9:02, archived)
Confirmed, it was one of Nigel Rees's booksstronglang.wordpress.com/2016/09/12/before-twitter-there-were-reess-pieces/
(, Mon 13 Jul 2026, 9:07, archived)