This attractive semi-postal airmail pair was issued by Spain to support Chile, featuring two distinguished literary figures linked to the cultural heritage of the Spanish-speaking world. The 0.20+0.20 stamp depicts Chilean Nobel Prize-winning poet Gabriela Mistral, while the 0.10+0.10 stamp portrays Spanish Renaissance poet Alonso de Ercilla, author of La Araucana. The surcharge on each stamp was intended for charitable assistance, reflecting humanitarian cooperation between Spain and Chile. Finely engraved portraits and elegant typography make this pair a desirable thematic addition for literature, charity, and airmail collectors.