Great rings, Mike! Glad you got those first two...I was looking at them myself. Third one down is really unique, never saw one like that before. I imagine those were produced for those kept out of the service for doing essential war work. Everybody was super patriotic in those times, so it was worn as a source of "team pride". I see nothing that would indicate it being cast in any way. The markings would indicate that the cartouche (which were often interchangeable) on this one was a new design at the time. Great pickups all around!