25 Baisa National Day

Oman's National Day commemorates the 1970 coup in which Qaboos bin Said deposed his father, Said bin Taimur, with British backing — ending a reign so isolationist that the country had fewer than ten kilometers of paved road and no public schools outside Muscat. The 1990 issue marks the twentieth anniversary of that transition.

KM#78 is a one-year type with no subsequent restrikes.