VERY FINE APPEARING EXAMPLE OF THE RARE "WHITE JACKSON FLAG" DESIGN WITH STARS ARRANGED IN A CROSS.
The second national Confederate flag, also known as the "White Jackson Flag" and "Stainless Banner" was introduced after its adoption by the Confederate government on May 1, 1863. Very few examples are known on Patriotic covers, as by 1863 paper shortages and printing expenses vastly decreased the usage of Patriotic covers.
Ex Ashbrook. Illustrated in Wishnietsky's Confederate Patriotic Covers and Their Usages on p. 87