I saw it in the background of the 1969 film [The Watchers](https://player.bfi.org.uk/free/film/watch-the-watchers-1969-online). I searched online and found it in a scan of old [magazines](https://www.richardrobertsarchive.org.uk/stockport-advertising-archive-blog/o0jf1699hgqyptaurzzahfgirp7s6y)
by blishbog
1 Comment
Yikes, the thumbnail size of this ad looks spooky