1¢ to 4¢ Pan-American Inverts
Issue Date: March 29, 2001
City: New York, NY
Printed by: Banknote Corporation of America
Printing Method: Lithographed and engraved
Perforations: 12 (#3505d) and 12 ½ x 12 (others)
The magnificent 1901 Pan-American Exposition celebrated the impressive progress America had made in engineering and industry. Six stamps were issued in conjunction with the fair. They were the first stamps of the twentieth century and the first bi-colored general release since the 1869 Pictorials. A printing error caused a number of prized inverted stamps. This souvenir sheet of four duplicates those famous issues.