Mexico, 1868, 6c-50c Hidalgo Issues, 6 exhibit pages showing retouches on each of the four thin figure values, along with a normal stamp without retouches for comparison, 6c - 8 retouches and 5 normal, 12c - 3 retouches and 2 normal, 25c 7 retouches and 5 normal, 50c - 2 retouches and 1 normal, 6c Stone A, 12c, 25c and 50c Stone B, nicely illustrated study, 34 stamps, Very Fine. Scott No. 46-55  Estimate $300 - 400. $0 (Image)