1928, 10 Fr. on 1, 50 blue in mixed franking with 1 F. And 50 C. postal stamps on registered airmail cover with cancellation "New York Au Havre 23. 8. 28" to Le Havre addressed, faultless condition, only issued 1. 000 copies, signed Scheller and certificate Calves, Michel 9. 000.- - very fine example this Europe-rarity in first-class condition!