Mexico, 1916, 50c-5p Views "Gobierno Constitucionalista", Corbata overprints inverted, full o.g., each well centered, rich colors, Very Fine and choice, a very scarce set of these elusive varieties, with 50c & 1p noted but unlisted in Scott, the 5p listed and priced at $300; 5p with 2008 MEPSI certificate. Scott No. 536-537 vars., 538a  Estimate $300 - 400. $0 (Image)