Mexico 1868, 6c black on buff, San Luis Potosí. Perf'd, cons 5-69, scarce curly line in value tablet variety, Matehuala fancy "Franco" cancel (Schatzkes 1510), beautifully centered, Very Fine. Scott No. 52  Estimate $50 - 75. $0 (Image)

Mexico 1868, 6c black on buff, San Luis Potosí. Cons 5-71, horizontal strip of four, tied by San Luis Potosi circular handstamps (Schatzkes 1460) on 1871 folded letter sheet to Mexico, Very Fine. Scott No. 58  Estimate $200 - 300. $0 (Image)

Mexico 1868, 6c black on buff, San Luis Potosí. Cons 5-71, two horizontal pairs, canceled by San Luis Potosí monogram oval wreath handstamp (Schatzkes 1454) on 1871 folded letter to Monterrey; light file folds affecting one stamp in each pair, F.-V.F. Scott No. 58  Estimate $150 - 200. $0 (Image)