An "inverted Jenny" stamp stolen in 1955 is finally being returned to its rightful owner.
The 1918 stamp, which features an airplane printed upside-down, will officially be handed over to the Philadelphia-based American Philatelic Research Library during the World Stamp Show in Manhattan on Thursday.
Considered America's most famous stamp, it surfaced at a New York auction house in April. The auctioneer, Spink USA, says it was submitted by a man who had inherited it.
It was one of four Jennys taken from a 1955 stamp convention. Two others were recovered in the 1980s and '70s.
The 24-cent stamps fetch hundreds of thousands of dollars today. There are only about 100 in existence.
A spokesman for the stamp show says the unidentified man who inherited the Jenny will receive a reward offered by a stamp dealer.