Issued by Mexico in 1979, this commemorative set celebrates the 50th anniversary of the autonomy of the National Autonomous University of Mexico (UNAM). The three designs reproduce important university murals by noted Mexican artists, including works by D. Alfaro Siqueiros and J. Chávez Morado, highlighting themes of national culture, energy, and historical mythology. The stamps reflect Mexico’s strong tradition of muralism and educational heritage, combining vibrant artistic expression with academic symbolism. With denominations of 0.80, 1.60 (airmail), and 3.00 pesos, the set represents both standard and airmail postal usage. Collectors value this issue for its artistic significance, university-related theme, and representation of Mexican modern art on postage stamps.