15 Pfg Lufthansa, 4 values, as well vertical pair with lower margin, on correctly franked airmail letter sheet to the first flight Hamburg-Dusseldorf-New York (with appropriate Cachet) with special cancel" (24 a) Hamburg airport / photograph of the oversea traffic 8.6.55" to Williamsburg / USA with arrival postmark, decorative and extreme scarce multiple franking, by Michel unpriced