National Day 1975 (Telecommunication Network) - 250 baisa

This high-value stamp celebrates Oman's 5th National Day in 1975 by summarizing the rapid technological transformation and logistical integration of the state's civic infrastructure. The design features a golden map of the Sultanate overlaid with key components of a contemporary communications network: a manual switchboard panel, a classic rotary telephone, a microwave transmission tower, and a detailed cross-section of an underground coaxial telecommunications cable. The composition carries a powerful message of administrative efficiency and territorial unity, showcasing how disparate regional hubs were systematically linked under a single national infrastructure. With the sovereign military portrait of Sultan Qaboos bin Said anchoring the top-right corner, the issue projects an image of robust modernization, framing technological development as a cornerstone of the Omani Renaissance (Al-Nahda).