This is the 1993 originally-issued Legends of the West $.29 stamp sheet, PLUS its replacement issued by the United States Postal Service. 

Legends of the West was a sheet of 29 cent stamps released by United States Postal Service (USPS). The initial issue contained an error which resulted in a recall. It featured a misidentification, portraying African-American rodeo performer Bill Pickett's younger brother, Ben Pickett, instead of Bill himself. See the photos to see the differences between the two sheets.

Both the original sheet and the sealed reissue sheet are in mint condition, having been framed for many years and displayed. 

Want to know more? Read this Smithsonian article to learn more, and buy this piece of US history!