Canal Zone, 1924, 1¢ deep green, flat "A", "ZONE" only. Position 6, right center stamp in a block of 9, o.g., never hinged, deep rich color, very fresh, usual natural s.e. at right, Extremely Fine, a choice example of this overprint error, with only 150 issued. Scott No. 71b  $350 for hinged single. $0 (Image)