Original Green Duck Co. Roosevelt campaign button ca 1932-36, union made Chicago

Campaign button is previously owned and worn, very good antique condition. Most likely from the 1932-36 campaign per the classic minimalist style from FDR's New Deal Era (though it could be from the 1940-44 campaign). Front of the pin is in good condition with union bug and markings from the Green Duck Co. in Chicago. The back of the button has tarnish. Slight scratches on the front likely from storage. See photos.