In 1947 General Mills offered one of the most popular premium rings ever created. Ring base has jagged design and burst to represent the action of atoms. The idea was to go into a dark room and remove the end cap to see flashing atoms, although the half life of the interior material was so brief that this function ceased to work very quickly. However, the interior of the ring does produce a nice glow after light exposure. The plaster end cap is not cracked as so often happened. Three tiny gray dots on the 'bomb' case. Brass luster is NM.