1901, 1¢ Pan-American, center inverted. Fresh and well centered with a well placed, neatly struck c.d.s. cancel in the upper right corner, natural straight edge at top, small thin spot and corner crease, an attractive, F.-V.F. appearing example of this popular invert, this popular inverted center is extremely rare in used condition; with 2006 P.F. certificate. Scott No. 294a  $13,000. $0 (Image)