1935, Thor Solberg flight, ´Liev Eiriksson´ souvenir envelope franked by Norway 7ø green, cancelled by commemorative roller Bergen, 16.VIII.35, ´Thor Solbergs/Flyvning 1935/U.S.A.-Norge via/Leiv Eirikssons Rute´, on top left blue Serial No. '23´, addressed to New York, signed by pilot, fine and scarce
