A striking semi-postal airmail issue from Argentina featuring the Emperor Penguin (Aptenodytes forsteri) with its chick, rendered in a classic monochrome engraving. Issued under the Pro-Infancia program, the additional surtax supported child welfare initiatives. Designed by Álvarez Boero and printed by Casa de Moneda, this stamp is prized by wildlife and Antarctic-thematic collectors for its elegant shading, natural posture, and early portrayal of Argentina’s sub-Antarctic fauna. A beautiful and meaningful addition for collectors of penguins, charity issues, and mid-20th-century South American postal history.