Guadalajara, 1867, 1r black on green laid, watermark paper, two stamps, one with "1863" error and is probably unique with both the error and the watermark; both stamps have thins, otherwise Very Fine, Scott $1,500 (without counting the "1863"error); "1868" stamp with 2003 MEPSI certificate. Scott Nos. 47a, 47c  Estimate $400 - 600. $0 (Image)