Mexico, 1868, 6c-25c Hidalgo Issues, San Luis Potosi. 5 stamps, cons 5-68; 6c, 12c vertical pair tied on piece by blue S.L. Potosi (Schatzkes 1444), two 25c singles canceled by rare Charcas Diligencias and other Venado (Rubio records only one Charcas Diligencia), Very Fine. Scott No. 52-54  Estimate $150 - 200. $0 (Image)