Mexico 1915, 10c blue & orange, Villa Monogram overprint. Neatly tied on locally addressed cover by "Mexico, D.F., 25, May. 15" machine postmark; central file fold, Very Fine, an extremely rare usage of an original Zapatista stamp on cover and probably the only known on cover usage of this stamp. Scott No. 453  Estimate $1,000 - 1,500. $0 (Image)