Collectors. One 46-star United States flag which is double-sided and machine-sewn, with many basting stitches present. Oklahoma is represented by the 46th star added to the flag when it became a state on November 16, 1907. The 46-star flag was the official U.S. flag from July 4, 1908 to July 4, 1912, when the stars for New Mexico and Arizona were added.