Mexico, 1894, 1c Yellow Green, Compound & Irregular Perfs, block of 25 showing most of the perforation errors: 5½ x 5½, 11 x 5½, 5½ x 11, 11x 11, also two other values with dramatic perforations cuts, o.g., mostly never hinged. Scott No. 238, 238 var.  Estimate $150 - 200. $0 (Image)