United States Flag, 23 stars
United States Flag, 23-stars, 1820-1822 Alabama and Maine were added as states in 1820, two stars were added to the flag, which increased the number of stars to 23. Thirteen stripes represent the thirteen original colonies. There is rumored to have been a 23-star flag with the stars arranged in the shape of one large star; however, there are no surviving copies.
Scott Stamp and Coin Co. The International Postage Stamp Album, 1894 Edition (New York: The Scott Stamp and Coin Co., Limited, 1893)