All Israeli aircraft are marked with a full blue Star of David on white circle, including these Missiles whoch are seen here on an old postcard issued probably towards one of the Israeli Independence Days.
Picture is courtesy of pictorial history collector Stephanie Comfort who published it on Flickr.
This blog (by Zeev Barkan) is dedicated to the Star of David, its history, its various meanings and usages in different cultures. It includes thousands of pictures of Star of David, six-pointed stars, hexagrams, Solomon's Seals, Magen Davids and yellow badges,and served as a resource for three books and four art exhibitions.