This issue alludes to the participation of Portugal in the 1970 World Exhibition that took place in Osaka from March to September. The Portuguese were the first Europeans to contact Japan, in the 16th century. The 5 Escudos stamps shows the emblem of the Jesuits, the first missionaries in Japan.
Each stamp is printed on the back with an explanation of its design. The 3.50 Escudos stamp was issued for airmail, but could be used for normal postage.
The stamps were designed by António Garcia, lithographed by the Mint on glazed paper sheets of 10×10 stamps of 1 and 3.50 Escudos and of 5×10 stamps of 5 and 6.50 Escudos, with perforation 13½, and circulated from 16 September 1970 to 31 December 1983.
|3.50||1,500,000||CA 11||1394||1106||C 11||PA 11|