1879, 10¢ brown, with secret mark, small defect, tied by circular grid cancel duplexed with "Cleveland, O. May 8" cds on 1880 cover to Guatemala at the 10¢ per ½ oz. American packet rate via Chagres or Colon (eff. Sep. 1862 to Aug. 1881), New York (5.10.80) transit backstamp, red "2" reales due rating for inland postage, Very Fine. Scott Nos. 188  Estimate $300 - 400. $0 (Image)

1879, 10¢ brown, with secret mark, full o.g., attractively centered amid large margins, beautiful rich deep color on bright paper, Very Fine, a lovely large margin mint example of the 1870 10¢ Bank Note Issue with Secret Mark; with 2001 P.F. certificate. Scott No. 188  $1,800. $0 (Image)

1879, 10¢ brown, with secret mark, cork cancel, attractively centered amid incredibly enormous margins, strong bold color, an Extremely Fine jumbo, one of the largest examples we have ever encountered; with 2008 P.S.E. Graded certificate (XF 90J, SMQ $245). Scott No. 188  $33. $0 (Image)