20c violet black AIR issue with variety 'OFICIAL' OVERPRINT IN RED, prepared for use but unissued. A fine mint copy. Expertised 'RUIDIAZ' on reverse. (SG O502 variety)
20c violet black AIR issue with variety 'OFICIAL' OVERPRINT IN RED, prepared for use but unissued. A fine mint copy. Expertised 'RUIDIAZ' on reverse. (SG O502 variety)