Issued in 1977, this vivid Rwandan 20c commemorative celebrates Journée Mondiale des Télécommunications (World Telecommunications Day). The design contrasts two historic methods of long-distance communication: a Roman-era signal tower on the left and a traditional African tam-tam (log drum) messenger on the right. Bright orange-green gradients emphasize the theme of global connectivity. The UIT (International Telecommunication Union) emblem reinforces the international nature of the issue. A beautifully illustrated thematic stamp valued by telecom-themed collectors and African postal history enthusiasts.