cover 1929, VARIG flight cover, 300r letter sheet flight cover from Porto Alegre to Rio Grande, franked with 50r Green (176), horizontal pair, 200r Rose (278) and two special VARIG adhesives (RHM nos. V-2B and V-4B), tied by VARIG 2 DEZ 29 special flight cachets, very fine, quite attractive, a rare usage, less than six known letter sheets are franked with VARIG stamps not illustrated est.