Mexico. Imperf?? VarietyNF #166:0,75/01. Cancelled. Perf. 12x12. NF #166a:0,50/01. Cancelled POCHUTLA cds, OAXACA. Schim #51/4. Perf.12x12. Cut on margin. NF #166:0,75/01. Blue color. Perf.12. Circular cds. MEXICO DF. Damaged, thinned. NF #166a:0,50/01.