Mexico, 1881, 50c green, without overprint, 6 singles, on a piece from Patzcuaro to Morelia in combination with 1884, 20c green, tied by circular handstamps (Schatzkes 963), Very Fine, these are rare used and are not priced as such by NF. Scott No. 121a+158  Estimate $150 - 200. $0 (Image)