Mexico, 1866, 13c blue, San Luis Potosi, without district name, cons 140-1866, block of 80, o.g., mostly never hinged, strong bold color, some creases mostly between margins, otherwise Very Fine, although unused singles are common, very large multiples like this are not, ex-E. Dormer. Scott No. 32  Estimate $1,500 - 2,000. $0 (Image)