This is a block of 20 mint never hinged stamps featuring the iconic Native American leader Sitting Bull. The stamps were issued in the United States in 1989, with a face value of $5.60 and a denomination of 28 cents each. The stamps come from a plate block/multiple and are in VF/XF (Very Fine/Extremely Fine) grade. The color of these stamps is green, and they have not been certified. These stamps are a great addition to any stamp collection, especially for those interested in Native American history and culture. They were produced to commemorate a legendary figure in American history and would make a fantastic gift for a stamp collector or history enthusiast.