'Second Pan American Postal Congress' issue overprinted 'HABILITADO 1931', PREAPRED FOR USE BUT UNISSUED. The set of seven fine mint. Rare. (SG 508/514)
'Second Pan American Postal Congress' issue overprinted 'HABILITADO 1931', PREAPRED FOR USE BUT UNISSUED. The set of seven fine mint. Rare. (SG 508/514)