There are many fake, counterfeit, and facsimile issues of Confederate stamps. The most common are known as the “Springfield” facsimiles.
Fourteen counterfeits were created and sold in the 1930's by a stamp dealer in Springfield, MA. They were sold as singles and blocks of four.
At some point, the dealer put the word “facsimile” on the back. The facsimiles were also used in booklets issued in 1941 by the Tatham Stamp Company.