This attractive pair from Mexico’s “Importa” definitive series highlights important imported goods categories represented through symbolic artwork. The $40 pesos stamp depicts stacked books labeled Libros, Ciencia, Arte, Letras, emphasizing intellectual and educational imports, while the $90 pesos issue illustrates Abulón (abalone), reflecting Mexico’s seafood trade. Featuring the characteristic eagle “Importa” emblem and modern graphic design typical of late-20th-century Mexican definitives, these stamps are notable for their economic-theme subject matter and clean typography. They are appealing additions for collectors of thematic trade, industry, education, and revenue-style postal issues.