Mexico 1939, 20c Sarabia Flight. Bottom margin single in combination with 20c definitive + 20c airmail on flight cover to New York City, tied by "Mexico, 23.May.39" First Day of Issue cds's, flight cachet and appropriate backstamps; file folds and cover tears at right, iate backstamps, Fine, a scarce commercial mail usage. Scott No. C93A  Estimate $200 - 300. $0 (Image)