Mexico, 1861, 8r black on red brown, Chalco. Circular grid cancels, ample to large margins showing frameline at top, Extremely Fine and attractive, perhaps the finest of the 4 to 5 known to exist, only 199 sent (NF $1,500); with 2008 MEPSI certificate. Scott No. 11  Estimate $750 - 1,000. $0 (Image)