Mexico, 1864-66, 1r blue, half used as ½r, Queretaro, on piece with 3 giant margins, oily double lined box cancel of Apaseo (Schatzkes 1283), an incredibly rare bisect for the ½r rate, Follansbee lists only one circular also from Queretaro, unlisted on piece, Very Fine, only The Second Known Copy of This Bisect; with 2010 MEPSI certificate. Scott Nos. 21c  Estimate $500 - 750. $0 (Image)