This unique US FDC First Day of Issue cover commemorates the Pittsburgh Bicentennial and Fort Duquesne's 200th anniversary in 1958.
 The cover features a vintage multi-color design with a cancellation type of First Day of Issue.
 It was issued in the United States and is ungraded and uncertified. 
 The cover showcases an important part of American history and is perfect for collectors of stamps and covers. 
The denomination is 4 cent, and it is also known as the Pittsburgh cover.
 This item is a great addition to any collection and a must-have for enthusiasts of Fort Duquesne and the Pittsburgh Bicentennial.