50 Centavos

Portugal's colonial coinage for São Tomé and Príncipe was administered through the Agência Geral do Ultramar, which standardized fractional issues across multiple African territories during the early 1950s — the same basic monetary framework applied from Angola to Mozambique. This 1951 issue came as the Estado Novo government under Salazar was tightening administrative control over its overseas provinces, reclassified from "colonies" to "províncias ultramarinas" the following year under the 1951 constitutional revision, a rhetorical maneuver designed to preempt UN decolonization pressure.

Struck at the Lisbon mint, this is the first and only date in the type.