CABO VERDE (Cape Verde) issued in 1952 a series of stamps honouring Portuguese sailors and maritime history. This particular stamp, shown here, featured a reproduction of a fragment from an anonymous Portuguese nautical chart dated around 1471. This type of map, known as a portolan chart, was used for navigation during the Age of Discovery and is characterised by its distinct rhumb lines radiating from a central compass rose. it was printed by Litografia Nacional - Porto (National Lithography - Porto).
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