United States: 1901 Pan-American Issue . 1c Pan-American, center inverted,. unused without gum, good color on fresh paper, trivial perf crease at lower right, not detracting from the appearance of this iconic and visually-striking stamp, fine; with 1975 P.F. certificate. (Sc. 294a, $12,500 as original gum). Unused (Image1)

Est. US$2,000-3,000