Staffa Scotland — Andrew Johnson US Presidents Commemorative Stamp Sheet ( not official)

 8-stamp commemorative sheet featuring a portrait of Andrew Johnson, the 17th President of the United States, alongside the American flag. Each individual stamp carries a face value of 17p and displays his years in office (1865–1869). The sheet is labeled as an "Official Commemorative Issue" and was printed under the name of Staffa, a tiny, uninhabited Scottish island 

it is not an official postage stamp