Angola 1912 Carlos I with 5 Centavos Surcharge Error

Angola · 1912 · 5 Centavos

This stamp features a portrait of King Carlos I of Portugal, a standard key-type design for Portuguese colonies. It bears a black '5 CENTAVOS' overprint, which is identified as an error surcharge.

Issued by Angola shortly after Portugal became a Republic in 1910, this stamp's surcharge likely reflects new postal rates or currency. The error makes it a notable example of transitional colonial philately.