Mexico Official Issue Stock, 1915-33. Good to better singles and sets on dealer's pages with items generally retailing between $20 to $100+; highlights including mint with #O110 x2, O117 x2, O118 x2, O134a-O143, O164, O192, O193, O194 x2, O195 x2, used with #O113-O116 x2, O127A, O134-O143, O153c, variety throughout including inverted overprints; some moderate duplication, owner's retail $8,213 (no photo). Estimate  $1,500 - 2,000. $0