Mexico, 1861, 8r green on red brown, Mexico, wide margins, tied by circular grid handstamp (Schatzkes 827) on 1863 folded letter sheet to Veracruz, Very Fine and scarce, only 20 covers with the 8r green are believed to exist; with 2008 MEPSI certificate. Scott Nos. 12  Estimate $1,000 - 1,500. $0 (Image)