Mexico, 1883, 6c Blue, Without Overprint, neatly tied on cover to New York City by blue "Mexico, Mar 6, 1884" duplex postmark, reverse with New Orleans, La. transit and receiving backstamps, with original enclosure, Very Fine, a scarce usage of the 1883, 6¢ blue without overprint. Scott No. 148a  Estimate $400 - 600. $0 (Image)