Lot
879 
Mexico, 1868, 6c black on buff, group of four o.g. blocks; including San Luis Potosi (5-71) right margin block of 4, Mazatlan (8-71) block of 8, Ures (31-72) left margin block of 8 and Tixtla (32-72) corner margin block of 8, Very Fine. Scott No. 58 Estimate $250 - 350.
Realized: $230