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The vessel depict on this stamp of the Netherlands Antilles issued in 2009 depict a CARAVELA REDONDA.
In the first half of the 16th century, the Portuguese created a specialized fighting ship also called caravela redonda to act as an escort in Brazil and in the East Indies route. It had a foremast with square sails (redonda) and three other masts with a lateen each, for a total of 4 masts. The hull was galleon-shaped, and some experts consider this vessel a forerunner of the fighting galleon. The Portuguese Man o' War (caravela da armada) was named after this curious type of fighting ship which was in use until the 18th century.
Netherlands Antilles 2009 2c sg?, scott?
St Thomas & Prince 1979 8d sg?, scott538
Cyprus 2011 0.43 Euro sg?, scott?
Source: http://en.wikipedia.org/wiki/Caravel Aak to Zumbra, A Dictionary of the World’s Watercraft.

The caravel redonda of the Portuguese fleet was a large vessel displacing from 150 to 180 tons; she assisted the armadas in the XVIth and XVIIth centuries.
Carried generally 4 masts, square-rigged in the main-mast and lateen rigged in the three other masts.
The scouts-caravels helped the fleets in missions of exploration and in this case were rigged with triangular sails only.
The square-rigged caravel took better advantage of the winds from the large, but lateen-rigged ones sailed close to the wind more efficiently.

Cuba 1972 2c sg1979.
Mozambique 1963 2s50 sg556, scott442.
Macao 1993 2p sg821, scott712
Portugal (Madeira) 2018 1.50 Euro sg?, scott?
Cuba 1992 30c sg 3740, scott3434
Portugal 2023 9.90 Euro sg?, Scott?

Source: Watercraft Philately Volume 15 page 32.