Luxembourg: 1936, 1. North America flight, handing in for transport Frankfurt with confirmation stamp "d", cover with 1 3 / 4 Fr. airmail from "Luxembourg-villas 2.5.36" and 75 Pfg North America flight to New York / USA with arrival postmark from 9. May, in perfect condition, expertized simon BPP with photo certificate "the document is genuine and perfect quality. "