Mexico, 1868, 6c black on buff, Durango. Imperf horizontal strip of six, cons. 22-69, ample to large margins, on reverse of 1870 folded letter to Santiago Papasquiaro, tied by Durango cds's (Schatzkes 238); few minor internal cover holes, still Very Fine; signed J.K. Bash. Scott No. 46  Estimate $150 - 200. $0 (Image)