Mexico, Airmail, 1934, 20c-20p National University Airmail issue complete. On three similar addressed 10c blue airmail entires; 20c-1p on one, 5p-10p another & 20p on last, all neatly tied by First Day of Issue "Agencia, Mexico D.F., 1 Set 34" cds's, addressed to Mazatlan; 20p cover with some negligible tiny tone specks mentioned for accuracy, Very Fine, a beautiful and very rare complete set on first day of issue covers. Scott No. C54-C61  Estimate $5,000 - 7,500. $0 (Image)