Each is 7/8”. First showing cardinal is c. 1920s and reads “Nature Guardian/Div. Of Conservation Ohio.” No backpaper and no maker as issued. Some lt. surface wear but mostly just showing only in reflected light and still very clean. Second is litho from 1950s reading “National Audubon Society/Protect Wildlife/Junior Member.” This is essentially Mint. Hake book Collectible Pin-Back Buttons photo example Animal Welfare section #26-27. Comes with Hake’s COA. See early robin and blue jay advertising buttons #502.