National Day 1975 (Water Desalination Plant) - 75 baisa

This stamp focuses on Oman’s rapid technological transformation, industrial infrastructure, and natural resource management by depicting the state-of-the-art Ghubrah water desalination and power plant. The detailed technical drawing illustrates the complex network of processing units, distillation blocks, water storage tanks, and exhaust stacks required to turn seawater into fresh drinking water for the growing capital region of Muscat. This subject carries a strong message of environmental mastery, resource security, and forward-looking economic planning in an arid geography. Positioned beneath the sovereign military portrait of Sultan Qaboos, the issue proudly projects an image of modern state capacity, showcasing how industrial engineering was deployed to secure vital public utilities for the nation's social development.