We first saw these big images side by side at a client's house. After that, we saw them behind the counter at Kid-O. We didn't know where they were from, but they stuck in our mind. They were simple, elegant and full of goodwill.
With a bit of research we discovered that they were the work of Enzo Mari (b. 1932), an Italian designer with a great legacy, who has become known for even more as "a writer, teacher, artist and designer of products, furniture and puzzle games."
First published by Danese in the 1960's they are in their second printing, the apple and the pear can be found at Kid-O, Nova 68 ($250).