Tonga 1 Pa'anga 1979 FAO - Technical Cooperation Program - Decade of Progress. Tāufaʻāhau Tupou IV (1965-2006). Obverse: Uniformed bust facing divides circular inscriptions. Lettering: DECADE OF PROGRESS 1969-1979 TONGA 1979. Reverse: 100 Palm trees. Lettering: PAANGA F.A.O. TECHNICAL COOPERATION PROGRAMME PAANGA. Edge Smooth. Copper-nickel. KM 60