This Chilean definitive stamp, originally issued with a 50 centavos denomination, features a finely engraved portrait of Germán Riesco, who served as President of Chile from 1901 to 1906. The design was printed by the Casa de Moneda de Chile in brown, showcasing precise line engraving. This specimen bears a bold “Eº 300” surcharge in black, indicating a provisional revaluation or postal rate adjustment — a common practice in mid-20th-century Chilean postal issues. Such overprints are of particular interest to collectors for their postal history significance and variations in surcharge type and font.