This three-stamp set from Guyana celebrates the inauguration of the Tropospheric Scatter Radiolink connecting Georgetown, Guyana with Port of Spain, Trinidad—a major technological milestone in regional communication. Issued around Christmas 1971, the designs feature stylized maps and transmission paths, along with striking depictions of the radiolink towers. The inscriptions “Guyana Sends Christmas Greetings to the World” highlight the symbolic use of the new link for international goodwill. A desirable thematic set for collectors of communications history, South America, and holiday-themed issues, especially in fresh, well-centered condition.