Angola Carlos I with Double Overprint Error

Angola · 1912 · 10 Centavos

This stamp features a portrait of King Carlos I of Portugal, originally denominated 2½ Reis. It bears a red double overprint, with '10 CENTAVOS' applied twice, one impression partially overlapping a '5 CENTAVOS' overprint, indicating a significant printing error.

Issued for the Portuguese colony of Angola in 1912, this stamp reflects the transition from monarchy to republic in Portugal, requiring colonial stamps to be overprinted with new republican denominations. The rare double overprint with differing values makes it a notable philatelic error.