Issued in 1940 to commemorate the national censuses conducted between 1939 and 1940, this striking airmail set exemplifies Mexico’s early modernist design period. Each denomination highlights a key sector of national development—transport and aviation (20c blue), industry (40c red), and commerce and agriculture (1 peso violet). The strong geometric lines and stylized imagery embody Mexico’s ambition and progress on the eve of World War II. These stamps are highly regarded for their Art Deco influence and symbolic representation of modernization in Mexican postal history.