Lot
882 
Mexico, 1868, 6c black on buff, Matamoros, horizontal pair, in combination with 1868, 12c black on green, Matamoros, both cons 9-71, and additional 1868, 12¢ black on green, Tampico, con 39-71 cut from an uncanceled letter, on July 1872 folded letter from Matramoros to Guanajuanto, carried privately by agent Enrique Duprat of Tula de Tamaulipas with oval handstamp on reverse, entered the mails in San Luis Potosi with 1872, 12c blue + 25c red, San Luis Potosi, con 37-72 affixed and all stamps canceled by fancy "Franco" handstamps (Schatzkes 1461), Very Fine, a unique unaccepted demonetized and postal fraud usage bearing stamps from three different districts, ex-Rosenthal; signed Lami and Calves, with 1987 MEPSI certificate. Scott No. 58-59+94-95 Estimate $5,000 - 7,500.
This cover not only was sent 3 months after the 1868 Full Face Hidalgo issue was demonetized, but was initially franked with stamps from two different districts. Even so, the cover was carried to another district rendering the stamps useless even if they where not demonetized.