Portugal on stamps

This series depicts four nautical instruments used by the Portuguese during the Age of Discoveries. The compass allows to determine the ship’s heading, while the cross-staff, the quadrant and the mariner’s astrolabe measure the altitude of a star (e.g. Polaris in the Northern hemisphere and the Sun in the Southern hemisphere), from which the ship’s latitude could be determined. While the cross-staff was more accurate, it was more difficult to use, and hence replaced by the other instruments.

The stamps were designed by José Luís Tinoco, lithographed by the Mint on enamelled paper sheets of 5×10 stamps with perforation 12×12½ and two phosphor bands, and circulated from 9 May 1992 to 31 March 1999.

Stamp Print run Afinsa Gibbons Michel Scott Yvert
60.00 1,000,000 2074 2283 1920 1910 1904
70.00 600,000 2075 2284 1921 1911 1905
100.00 600,000 2076 2285 1922 1912 1906
120.00 600,000 2077 2286 1923 1913 1907

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