Mexico, 1861, 4r black on yellow, Saltillo, half used as 2r. Diagonal bisect tied by Viezca boxed date stamp (Schatzkes 1432) on folded letter to Parras, Very Fine; with 2001 MEPSI certificate. Scott No. 9a  Estimate $600 - 800. $0 (Image)

Mexico, 1861, 4r black on yellow, Saltillo, half used as 2r. Diagonal bisect tied by Saltillo oval date stamp (Schatzkes 1355) on folded letter to S.L. Potosi; light cover wrinkling and slight ink erosion in address panel, Fine. Scott No. 9a  Estimate $300 - 400. $0 (Image)