
6c on 10c olive brown 'Correo Aereo' surcharge issue with blue 'Signature Control' overprint additionally overprinted VALIDO 1935 in red and signed by the postmaster. A fine mint copy. Very Scarce. (SG 804 variety)
6c on 10c olive brown 'Correo Aereo' surcharge issue with blue 'Signature Control' overprint additionally overprinted VALIDO 1935 in red and signed by the postmaster. A fine mint copy. Very Scarce. (SG 804 variety)