Issued in 1992 by the Republic of Chad, this 40F stamp promotes literacy under the theme “Lutte Contre l’Analphabétisme” (Fight Against Illiteracy). The illustration depicts an open-air classroom under trees, with a teacher pointing to a chalkboard showing the Latin alphabet and numbers, while another board displays Arabic script. Adults and children are shown participating in the learning process, highlighting the importance of education for all ages. Printed by Courvoisier, this issue reflects Chad’s cultural and linguistic diversity and its commitment to combating illiteracy.