Mexico, 1856-60 Sello Negros Covers, 4 folded letters; Ciudad Victoria cover (Schatzkes 1817 + 1818) with perfect stamping of the oval Victoria postmark dated August 1859, Atlixco entire (Schatzkes 1177A) dated June 1860, Soyaniquilpam straight line (Schatzkes 1546, July 1860) and the rare Piedras Negras manuscript (Schatzkes 1424, September 1856), Very Fine. Estimate  $250 - 350. $0 (Image)