stamp intended to prepay airmail postage; the first recorded is the 1917 Italian ‘Express’ stamp, 200,000 of which were overprinted; (Fr.) Timbre pour la Poste Aerienne; (It.) Francobollo di Posta Aerea; (Sp.) Sello de Correo Aereo.
stamp intended to prepay airmail postage; the first recorded is the 1917 Italian ‘Express’ stamp, 200,000 of which were overprinted; (Fr.) Timbre pour la Poste Aerienne; (It.) Francobollo di Posta Aerea; (Sp.) Sello de Correo Aereo.
