Mexico, 1856, 2r yellow green, without overprint, Zacatecas provisional use in 1864 (the most difficult one to find), mute "O" cancels, F.-V.F.; with 2010 MEPSI certificate. Scott No. 3d  Estimate $400 - 600. $0 (Image)

Mexico, 1856, 2r yellow green, without overprint (Polotitlan), oval Polotitlan cancel (Schatzkes 1145), margins large to touching at lower right, rich color, Very Fine, very rare, one of 150 sent with 4 returned. Scott No. 3d  Estimate $1,000 - 1,500. $0 (Image)