Mexico 1868, 6c black on buff, Chiapas. Cons 28-70, imperf, complete sheet of 100, full sheet margins, manuscript diagonal pen markings forming an "X" on each stamp as well as the manuscript. name "Lopez" across the sheet, 20 strikes of the Tonala Administration mark (Schatzkes 131) and 4 strikes of the two-line "Franco en Tonala" (Schatzkes #130) in the corners used as registration marks, minimal light file folds quarter the sheet, couple small internal holes, Very Fine appearance, a unique exhibition piece. Scott No. 58  Estimate $2,000 - 2,500. $0 (Image)