Canal Zone, 1904, 10c yellow. Block of 4, tropicalized o.g., right stamps with a vertical crease, otherwise Fine; with 2006 P.F. certificate. Scott No. 3  $1,750. $0 (Image)

Canal Zone, 1904, 10c yellow. Lightly cancelled, Extremely Fine; with 1973 A.P.S. certificate, signed Bloch. Scott No. 3  $250. $0 (Image)

Canal Zone, 1904, 10c yellow. Bold Cristobal Jul 13, 1904 postmark, Fine; with 2004 P.S.E. certificate for on piece. Scott No. 3  $250. $0 (Image)

Canal Zone, 1904, 10c yellow. Neatly tied by bar cancel on cover to Colon, matching "Canal Zone, La Boca, Jul 16, 1904" cds, Cristobal transit; cover with small edge tear from opening at lower left, Very Fine. Scott No. 3  Estimate $150 - 200. $0 (Image)

Canal Zone, 1904, 10c yellow. Block of 4 with "inverted M" in top right stamp, nice item, tropicalized o.g., Fine, only 400 of this variety printed; with 1990 P.F. certificate. Scott No. 13 var  $168. $0 (Image)