Pan American Invert
The Pan-American invert was issued in 1901 in USA during the Pan-American Expo. The stamps were issued with ornate colored frames enclosing a black-and-white image of various means of transportation. The two color printing left the possibility of errors. The stamp contained three denominations, 1 cent, 2 cents and 4 cents, out of which the 1 cent was considerably more common than the others.
Estimated Price : $100,000