A pair of early postage due stamps from São Tomé & Príncipe, issued in 1921 as part of the definitive "Porteado" series, produced at the Casa da Moeda in Lisbon by typography printing. The set includes the 1 centavo in slate violet with black overprint (Scott J43) and the 3 centavos in red-orange with black overprint (Scott J45). Both stamps feature the ornate classical frame design created by José Sérgio de Carvalho e Silva, with prominent denomination numerals at center, framed by laurel leaves and the inscription "RECEBER." These stamps reflect the postal administration's system of surcharging addressees for unpaid postage during the early 20th century. The issue belongs to the broader Portuguese colonial postal tradition, known for their distinctive typography-printed dues with simple yet elegant ornamental motifs. Examples of this series are sought after for their historical significance, as they represent the transition of São Tomé & Príncipe into a more modernized postal framework under the Portuguese Republic. Their fresh colors and sharp impressions underscore the skilled craftsmanship of Portuguese colonial print production in the 1920s. Estimate "$20 – 30".
Condition: Both stamps mint never hinged (MNH), good centering, clean gum, vivid colors.