Mexico 1856, 2r sap green, Morelia. Top margin single from first plate, tied by bold "Franco, Zacapo" straight line handstamp (Schatzkes 1016 - 100 points) on 1857 folded letter sheet to Guadalajara; cover with faint filing crease affecting bottom of stamp, otherwise Very Fine, extremely rare and quite possibly a unique usage from Zacapu; with 1987 MEPSI certificate. Scott No. 3 var.  Estimate $750 - 1,000. $0 (Image)