1934 (31 Oct) First Experimental Rocket Mail in Italy, cover franked with Italian adhesives, used in combination with the specially prepared Rocket Mail 5L triangular adhesive, canceled by "Esperimenti di Posta Per Razzo Espreso", from Trieste to Frankfurt, v.f., with detailed Longhi certificate stating that this is the only known cover with regular franking and 5L vignette (Image)

Est.US$150