Mexico, 1864-66 "Sello Negro" Covers. 26 covers primarily Eagle period towns including Salamanca (Schatzkes 1331), Sierra Hermosa (1911), Guanajuato (476), Allende (145), Tlaliscoyan (1804C), Magiscatzin (1591+1590A), Mapimi (270), Nazas, Mier (1833+1833A), Parral (1414+1414A), Aguascalientes, Amapa, Colotlan (1865AB), Lampazos (878A+879), etc.; clear full strikes throughout, few cover flaws, overall Very Fine. Estimate  $750 - 1,000. $0 (Image)