Issued by Rwanda in 1974 to commemorate the 100th anniversary of the Universal Postal Union (1874–1974), this 20 centime stamp depicts a historical monk-messenger, symbolizing early long-distance communication and the human origins of organized postal systems. The artwork highlights a messenger carrying a scroll and staff, rendered in detailed period costume. Part of a thematic set celebrating the evolution of mail delivery, this issue is appreciated by postal-history collectors and UPU-thematic specialists. Clean, crisp printing and classic 1970s Rwandan design make this a desirable addition for worldwide postal-history collections.