Mexico 1861, 2r black on pink, Oaxaca. Fine single tied by unlisted "E" handstamp on 1861 cover to Oaxaca, matching "Villa Alta de San Ildefonso" boxed handstamp (Schatzkes 1084) at top; light horizontal file fold affecting stamp, otherwise Very Fine, a rare usage from Villa Alta de San Ildefonso with the canceling handstamp possibly unique. Scott No. 8  Estimate $750 - 1,000. $0 (Image)