Mexico 1868, 100c black on brown & 50c black on yellow, Zacatecas. Cons 13-71 & 13-70, singles on separate covers, each tied by Zacatecas circular handstamp (Schatzkes 1852); 50c on 1870 folded letter and 100c on 1872 folded letter sheet, Very Fine, excess weight rate covers and very scarce; signed John Bash. Scott No. 64, 62  Estimate $200 - 300. $0 (Image)