A David Pelham Penguin cover for a 1976 edition of Kurt Vonnegut’s Novel “Cat’s Cradle”
Scan via Flickr User: Michael Bojkowski he’s also got a little selection of Illustrated Paperback cover’s here http://www.flickr.com/photos/mooski/sets/72157594314437849/
Also of note: check this excellent compendium of Penguin SF Book covers: http://www.penguinsciencefiction.org/ Many thanks to Thistle for that link!
Cat’s Cradle by the way is that game you play with string wrapped round your fingers… I couldn’t remember it either!