Mexico, 1856, 1r yellow + 2r green + 4r red, Durango. Slightly overlapping on 1857 folded letter sheet to Mexico City, canceled by "Durango, Octubre 25" boxed date stamp (Schatzkes 234); cover file fold, Very Fine, a scarce three color franking; with 2010 MEPSI certificate. Scott No. 2+3+4  Estimate $750 - 1,000. $0 (Image)