Mexico 1867, 8r green on red brown. Grid cancel (Schatzkes 827), ample to mostly huge margins, Extremely Fine, an exceptional sound example of this high value rarity, with less than ten singles known most of which are faulty; with 2009 MEPSI certificate. Scott No. 41; $4,000  Estimate $2,000 - 3,000. $0 (Image)